2021-02-08 17:01:00

39 files changed, 1016 insertions, 250 deletions

diff --git a/context/data/scite/context/lexers/data/scite-context-data-tex.lua b/context/data/scite/context/lexers/data/scite-context-data-tex.lua
index 169e43bd7..93f696f5f 100644
--- a/context/data/scite/context/lexers/data/scite-context-data-tex.lua
+++ b/context/data/scite/context/lexers/data/scite-context-data-tex.lua
@@ -1,6 +1,6 @@
 return {
  ["aleph"]={ "Alephminorversion", "Alephrevision", "Alephversion" },
- ["etex"]={ "botmarks", "clubpenalties", "currentgrouplevel", "currentgrouptype", "currentifbranch", "currentiflevel", "currentiftype", "detokenize", "dimexpr", "displaywidowpenalties", "everyeof", "firstmarks", "fontchardp", "fontcharht", "fontcharic", "fontcharwd", "glueexpr", "glueshrink", "glueshrinkorder", "gluestretch", "gluestretchorder", "gluetomu", "ifcsname", "ifdefined", "iffontchar", "interactionmode", "interlinepenalties", "lastlinefit", "lastnodetype", "marks", "muexpr", "mutoglue", "numericscale", "numexpr", "pagediscards", "parshapedimen", "parshapeindent", "parshapelength", "predisplaydirection", "protected", "savinghyphcodes", "savingvdiscards", "scantokens", "showgroups", "showifs", "showtokens", "splitbotmarks", "splitdiscards", "splitfirstmarks", "topmarks", "tracingalignments", "tracingassigns", "tracinggroups", "tracingifs", "tracingnesting", "unexpanded", "unless", "widowpenalties" },
+ ["etex"]={ "botmarks", "clubpenalties", "currentgrouplevel", "currentgrouptype", "currentifbranch", "currentiflevel", "currentiftype", "detokenize", "dimexpr", "displaywidowpenalties", "everyeof", "firstmarks", "fontchardp", "fontcharht", "fontcharic", "fontcharwd", "glueexpr", "glueshrink", "glueshrinkorder", "gluestretch", "gluestretchorder", "gluetomu", "ifcsname", "ifdefined", "iffontchar", "interactionmode", "interlinepenalties", "lastchkdim", "lastchknum", "lastlinefit", "lastnodetype", "marks", "muexpr", "mutoglue", "numericscale", "numexpr", "pagediscards", "parshapedimen", "parshapeindent", "parshapelength", "predisplaydirection", "protected", "savinghyphcodes", "savingvdiscards", "scantokens", "showgroups", "showifs", "showtokens", "splitbotmarks", "splitdiscards", "splitfirstmarks", "topmarks", "tracingalignments", "tracingassigns", "tracinggroups", "tracingifs", "tracingnesting", "unexpanded", "unless", "widowpenalties" },
  ["luatex"]={ "UUskewed", "UUskewedwithdelims", "Uabove", "Uabovewithdelims", "Uatop", "Uatopwithdelims", "Uchar", "Udelcode", "Udelcodenum", "Udelimiter", "Udelimiterover", "Udelimiterunder", "Uhextensible", "Uleft", "Umathaccent", "Umathaccentbaseheight", "Umathaxis", "Umathbinbinspacing", "Umathbinclosespacing", "Umathbininnerspacing", "Umathbinopenspacing", "Umathbinopspacing", "Umathbinordspacing", "Umathbinpunctspacing", "Umathbinrelspacing", "Umathchar", "Umathcharclass", "Umathchardef", "Umathcharfam", "Umathcharnum", "Umathcharnumdef", "Umathcharslot", "Umathclass", "Umathclosebinspacing", "Umathcloseclosespacing", "Umathcloseinnerspacing", "Umathcloseopenspacing", "Umathcloseopspacing", "Umathcloseordspacing", "Umathclosepunctspacing", "Umathcloserelspacing", "Umathcode", "Umathcodenum", "Umathconnectoroverlapmin", "Umathfractiondelsize", "Umathfractiondenomdown", "Umathfractiondenomvgap", "Umathfractionnumup", "Umathfractionnumvgap", "Umathfractionrule", "Umathinnerbinspacing", "Umathinnerclosespacing", "Umathinnerinnerspacing", "Umathinneropenspacing", "Umathinneropspacing", "Umathinnerordspacing", "Umathinnerpunctspacing", "Umathinnerrelspacing", "Umathlimitabovebgap", "Umathlimitabovekern", "Umathlimitabovevgap", "Umathlimitbelowbgap", "Umathlimitbelowkern", "Umathlimitbelowvgap", "Umathnolimitsubfactor", "Umathnolimitsupfactor", "Umathopbinspacing", "Umathopclosespacing", "Umathopenbinspacing", "Umathopenclosespacing", "Umathopeninnerspacing", "Umathopenopenspacing", "Umathopenopspacing", "Umathopenordspacing", "Umathopenpunctspacing", "Umathopenrelspacing", "Umathoperatorsize", "Umathopinnerspacing", "Umathopopenspacing", "Umathopopspacing", "Umathopordspacing", "Umathoppunctspacing", "Umathoprelspacing", "Umathordbinspacing", "Umathordclosespacing", "Umathordinnerspacing", "Umathordopenspacing", "Umathordopspacing", "Umathordordspacing", "Umathordpunctspacing", "Umathordrelspacing", "Umathoverbarkern", "Umathoverbarrule", "Umathoverbarvgap", "Umathoverdelimiterbgap", "Umathoverdelimitervgap", "Umathpunctbinspacing", "Umathpunctclosespacing", "Umathpunctinnerspacing", "Umathpunctopenspacing", "Umathpunctopspacing", "Umathpunctordspacing", "Umathpunctpunctspacing", "Umathpunctrelspacing", "Umathquad", "Umathradicaldegreeafter", "Umathradicaldegreebefore", "Umathradicaldegreeraise", "Umathradicalkern", "Umathradicalrule", "Umathradicalvgap", "Umathrelbinspacing", "Umathrelclosespacing", "Umathrelinnerspacing", "Umathrelopenspacing", "Umathrelopspacing", "Umathrelordspacing", "Umathrelpunctspacing", "Umathrelrelspacing", "Umathskewedfractionhgap", "Umathskewedfractionvgap", "Umathspaceafterscript", "Umathspacebeforescript", "Umathspacingmode", "Umathstackdenomdown", "Umathstacknumup", "Umathstackvgap", "Umathsubshiftdown", "Umathsubshiftdrop", "Umathsubsupshiftdown", "Umathsubsupvgap", "Umathsubtopmax", "Umathsupbottommin", "Umathsupshiftdrop", "Umathsupshiftup", "Umathsupsubbottommax", "Umathunderbarkern", "Umathunderbarrule", "Umathunderbarvgap", "Umathunderdelimiterbgap", "Umathunderdelimitervgap", "Umiddle", "Unosubprescript", "Unosubscript", "Unosuperprescript", "Unosuperscript", "Uover", "Uoverdelimiter", "Uoverwithdelims", "Uradical", "Uright", "Uroot", "Uskewed", "Uskewedwithdelims", "Ustack", "Ustartdisplaymath", "Ustartmath", "Ustopdisplaymath", "Ustopmath", "Ustyle", "Usubprescript", "Usubscript", "Usuperprescript", "Usuperscript", "Uunderdelimiter", "Uvextensible", "adjustspacing", "adjustspacingshrink", "adjustspacingstep", "adjustspacingstretch", "afterassigned", "aftergrouped", "aliased", "alignmark", "aligntab", "atendofgroup", "atendofgrouped", "attribute", "attributedef", "automaticdiscretionary", "automatichyphenpenalty", "automigrationmode", "begincsname", "beginlocalcontrol", "boundary", "boxattribute", "boxdirection", "boxorientation", "boxtotal", "boxxmove", "boxxoffset", "boxymove", "boxyoffset", "catcodetable", "clearmarks", "crampeddisplaystyle", "crampedscriptscriptstyle", "crampedscriptstyle", "crampedtextstyle", "csstring", "defcsname", "dimensiondef", "directlua", "edefcsname", "efcode", "endlocalcontrol", "enforced", "etoksapp", "etokspre", "everytab", "exceptionpenalty", "expand", "expandafterpars", "expandafterspaces", "expandcstoken", "expanded", "expandtoken", "explicitdiscretionary", "explicithyphenpenalty", "firstvalidlanguage", "fontid", "fontspecifiedsize", "formatname", "frozen", "futuredef", "futureexpand", "futureexpandis", "futureexpandisap", "gdefcsname", "gleaders", "glet", "gletcsname", "gluespecdef", "glyphdatafield", "glyphoptions", "glyphscale", "glyphscriptfield", "glyphscriptscale", "glyphscriptscriptscale", "glyphstatefield", "glyphtextscale", "glyphxoffset", "glyphxscale", "glyphyoffset", "glyphyscale", "gtoksapp", "gtokspre", "hjcode", "hpack", "hyphenationmin", "hyphenationmode", "ifabsdim", "ifabsnum", "ifarguments", "ifboolean", "ifchkdim", "ifchknum", "ifcmpdim", "ifcmpnum", "ifcondition", "ifcstok", "ifdimval", "ifempty", "ifflags", "ifhastok", "ifhastoks", "ifhasxtoks", "ifincsname", "ifmathparameter", "ifmathstyle", "ifnumval", "ifparameter", "ifparameters", "ifrelax", "iftok", "ignorearguments", "ignorepars", "immediate", "immutable", "initcatcodetable", "insertheights", "insertht", "instance", "integerdef", "lastarguments", "lastnamedcs", "lastnodesubtype", "leftmarginkern", "letcharcode", "letcsname", "letfrozen", "letprotected", "linedirection", "linepar", "listcallbackmode", "localbrokenpenalty", "localcontrol", "localcontrolled", "localinterlinepenalty", "localleftbox", "localrightbox", "lpcode", "luabytecode", "luabytecodecall", "luacopyinputnodes", "luadef", "luaescapestring", "luafunction", "luafunctioncall", "luatexbanner", "luatexrevision", "luatexversion", "mathdelimitersmode", "mathdirection", "mathdisplayskipmode", "matheqnogapstep", "mathflattenmode", "mathitalicsmode", "mathnolimitsmode", "mathpenaltiesmode", "mathrulesfam", "mathrulesmode", "mathrulethicknessmode", "mathscale", "mathscriptboxmode", "mathscriptcharmode", "mathscriptsmode", "mathstyle", "mathsurroundmode", "mathsurroundskip", "mugluespecdef", "mutable", "noaligned", "noboundary", "nohrule", "norelax", "normalizelinemode", "nospaces", "novrule", "orelse", "orunless", "outputbox", "overloaded", "overloadmode", "parametercount", "parattr", "pardirection", "permanent", "postexhyphenchar", "posthyphenchar", "prebinoppenalty", "predisplaygapfactor", "preexhyphenchar", "prehyphenchar", "prerelpenalty", "protrudechars", "protrusionboundary", "pxdimen", "quitvmode", "rightmarginkern", "rpcode", "savecatcodetable", "scantextokens", "setfontid", "snapshotpar", "supmarkmode", "swapcsvalues", "textdirection", "thewithoutunit", "tokenized", "toksapp", "tokspre", "tolerant", "tpack", "tracingfonts", "tracingmath", "undent", "unletfrozen", "unletprotected", "vpack", "wordboundary", "wrapuppar", "xdefcsname", "xtoksapp", "xtokspre" },
  ["omega"]={ "Omegaminorversion", "Omegarevision", "Omegaversion" },
  ["pdftex"]={ "ifpdfabsdim", "ifpdfabsnum", "ifpdfprimitive", "pdfadjustspacing", "pdfannot", "pdfcatalog", "pdfcolorstack", "pdfcolorstackinit", "pdfcompresslevel", "pdfcopyfont", "pdfcreationdate", "pdfdecimaldigits", "pdfdest", "pdfdestmargin", "pdfdraftmode", "pdfeachlinedepth", "pdfeachlineheight", "pdfendlink", "pdfendthread", "pdffirstlineheight", "pdffontattr", "pdffontexpand", "pdffontname", "pdffontobjnum", "pdffontsize", "pdfgamma", "pdfgentounicode", "pdfglyphtounicode", "pdfhorigin", "pdfignoreddimen", "pdfignoreunknownimages", "pdfimageaddfilename", "pdfimageapplygamma", "pdfimagegamma", "pdfimagehicolor", "pdfimageresolution", "pdfincludechars", "pdfinclusioncopyfonts", "pdfinclusionerrorlevel", "pdfinfo", "pdfinfoomitdate", "pdfinsertht", "pdflastannot", "pdflastlinedepth", "pdflastlink", "pdflastobj", "pdflastxform", "pdflastximage", "pdflastximagepages", "pdflastxpos", "pdflastypos", "pdflinkmargin", "pdfliteral", "pdfmajorversion", "pdfmapfile", "pdfmapline", "pdfminorversion", "pdfnames", "pdfnoligatures", "pdfnormaldeviate", "pdfobj", "pdfobjcompresslevel", "pdfomitcharset", "pdfomitcidset", "pdfoutline", "pdfoutput", "pdfpageattr", "pdfpagebox", "pdfpageheight", "pdfpageref", "pdfpageresources", "pdfpagesattr", "pdfpagewidth", "pdfpkfixeddpi", "pdfpkmode", "pdfpkresolution", "pdfprimitive", "pdfprotrudechars", "pdfpxdimen", "pdfrandomseed", "pdfrecompress", "pdfrefobj", "pdfrefxform", "pdfrefximage", "pdfreplacefont", "pdfrestore", "pdfretval", "pdfsave", "pdfsavepos", "pdfsetmatrix", "pdfsetrandomseed", "pdfstartlink", "pdfstartthread", "pdfsuppressoptionalinfo", "pdfsuppressptexinfo", "pdftexbanner", "pdftexrevision", "pdftexversion", "pdfthread", "pdfthreadmargin", "pdftracingfonts", "pdftrailer", "pdftrailerid", "pdfuniformdeviate", "pdfuniqueresname", "pdfvorigin", "pdfxform", "pdfxformattr", "pdfxformmargin", "pdfxformname", "pdfxformresources", "pdfximage" },
diff --git a/context/data/scite/context/scite-context-data-tex.properties b/context/data/scite/context/scite-context-data-tex.properties
index 6caec7635..bbacc7a02 100644
--- a/context/data/scite/context/scite-context-data-tex.properties
+++ b/context/data/scite/context/scite-context-data-tex.properties
@@ -7,13 +7,14 @@ currentifbranch currentiflevel currentiftype detokenize dimexpr \
 displaywidowpenalties everyeof firstmarks fontchardp fontcharht \
 fontcharic fontcharwd glueexpr glueshrink glueshrinkorder \
 gluestretch gluestretchorder gluetomu ifcsname ifdefined \
-iffontchar interactionmode interlinepenalties lastlinefit lastnodetype \
-marks muexpr mutoglue numericscale numexpr \
-pagediscards parshapedimen parshapeindent parshapelength predisplaydirection \
-protected savinghyphcodes savingvdiscards scantokens showgroups \
-showifs showtokens splitbotmarks splitdiscards splitfirstmarks \
-topmarks tracingalignments tracingassigns tracinggroups tracingifs \
-tracingnesting unexpanded unless widowpenalties 
+iffontchar interactionmode interlinepenalties lastchkdim lastchknum \
+lastlinefit lastnodetype marks muexpr mutoglue \
+numericscale numexpr pagediscards parshapedimen parshapeindent \
+parshapelength predisplaydirection protected savinghyphcodes savingvdiscards \
+scantokens showgroups showifs showtokens splitbotmarks \
+splitdiscards splitfirstmarks topmarks tracingalignments tracingassigns \
+tracinggroups tracingifs tracingnesting unexpanded unless \
+widowpenalties 
 
 keywordclass.tex.luatex=\
 UUskewed UUskewedwithdelims Uabove Uabovewithdelims \
diff --git a/context/data/textadept/context/data/scite-context-data-tex.lua b/context/data/textadept/context/data/scite-context-data-tex.lua
index 169e43bd7..93f696f5f 100644
--- a/context/data/textadept/context/data/scite-context-data-tex.lua
+++ b/context/data/textadept/context/data/scite-context-data-tex.lua
@@ -1,6 +1,6 @@
 return {
  ["aleph"]={ "Alephminorversion", "Alephrevision", "Alephversion" },
- ["etex"]={ "botmarks", "clubpenalties", "currentgrouplevel", "currentgrouptype", "currentifbranch", "currentiflevel", "currentiftype", "detokenize", "dimexpr", "displaywidowpenalties", "everyeof", "firstmarks", "fontchardp", "fontcharht", "fontcharic", "fontcharwd", "glueexpr", "glueshrink", "glueshrinkorder", "gluestretch", "gluestretchorder", "gluetomu", "ifcsname", "ifdefined", "iffontchar", "interactionmode", "interlinepenalties", "lastlinefit", "lastnodetype", "marks", "muexpr", "mutoglue", "numericscale", "numexpr", "pagediscards", "parshapedimen", "parshapeindent", "parshapelength", "predisplaydirection", "protected", "savinghyphcodes", "savingvdiscards", "scantokens", "showgroups", "showifs", "showtokens", "splitbotmarks", "splitdiscards", "splitfirstmarks", "topmarks", "tracingalignments", "tracingassigns", "tracinggroups", "tracingifs", "tracingnesting", "unexpanded", "unless", "widowpenalties" },
+ ["etex"]={ "botmarks", "clubpenalties", "currentgrouplevel", "currentgrouptype", "currentifbranch", "currentiflevel", "currentiftype", "detokenize", "dimexpr", "displaywidowpenalties", "everyeof", "firstmarks", "fontchardp", "fontcharht", "fontcharic", "fontcharwd", "glueexpr", "glueshrink", "glueshrinkorder", "gluestretch", "gluestretchorder", "gluetomu", "ifcsname", "ifdefined", "iffontchar", "interactionmode", "interlinepenalties", "lastchkdim", "lastchknum", "lastlinefit", "lastnodetype", "marks", "muexpr", "mutoglue", "numericscale", "numexpr", "pagediscards", "parshapedimen", "parshapeindent", "parshapelength", "predisplaydirection", "protected", "savinghyphcodes", "savingvdiscards", "scantokens", "showgroups", "showifs", "showtokens", "splitbotmarks", "splitdiscards", "splitfirstmarks", "topmarks", "tracingalignments", "tracingassigns", "tracinggroups", "tracingifs", "tracingnesting", "unexpanded", "unless", "widowpenalties" },
  ["luatex"]={ "UUskewed", "UUskewedwithdelims", "Uabove", "Uabovewithdelims", "Uatop", "Uatopwithdelims", "Uchar", "Udelcode", "Udelcodenum", "Udelimiter", "Udelimiterover", "Udelimiterunder", "Uhextensible", "Uleft", "Umathaccent", "Umathaccentbaseheight", "Umathaxis", "Umathbinbinspacing", "Umathbinclosespacing", "Umathbininnerspacing", "Umathbinopenspacing", "Umathbinopspacing", "Umathbinordspacing", "Umathbinpunctspacing", "Umathbinrelspacing", "Umathchar", "Umathcharclass", "Umathchardef", "Umathcharfam", "Umathcharnum", "Umathcharnumdef", "Umathcharslot", "Umathclass", "Umathclosebinspacing", "Umathcloseclosespacing", "Umathcloseinnerspacing", "Umathcloseopenspacing", "Umathcloseopspacing", "Umathcloseordspacing", "Umathclosepunctspacing", "Umathcloserelspacing", "Umathcode", "Umathcodenum", "Umathconnectoroverlapmin", "Umathfractiondelsize", "Umathfractiondenomdown", "Umathfractiondenomvgap", "Umathfractionnumup", "Umathfractionnumvgap", "Umathfractionrule", "Umathinnerbinspacing", "Umathinnerclosespacing", "Umathinnerinnerspacing", "Umathinneropenspacing", "Umathinneropspacing", "Umathinnerordspacing", "Umathinnerpunctspacing", "Umathinnerrelspacing", "Umathlimitabovebgap", "Umathlimitabovekern", "Umathlimitabovevgap", "Umathlimitbelowbgap", "Umathlimitbelowkern", "Umathlimitbelowvgap", "Umathnolimitsubfactor", "Umathnolimitsupfactor", "Umathopbinspacing", "Umathopclosespacing", "Umathopenbinspacing", "Umathopenclosespacing", "Umathopeninnerspacing", "Umathopenopenspacing", "Umathopenopspacing", "Umathopenordspacing", "Umathopenpunctspacing", "Umathopenrelspacing", "Umathoperatorsize", "Umathopinnerspacing", "Umathopopenspacing", "Umathopopspacing", "Umathopordspacing", "Umathoppunctspacing", "Umathoprelspacing", "Umathordbinspacing", "Umathordclosespacing", "Umathordinnerspacing", "Umathordopenspacing", "Umathordopspacing", "Umathordordspacing", "Umathordpunctspacing", "Umathordrelspacing", "Umathoverbarkern", "Umathoverbarrule", "Umathoverbarvgap", "Umathoverdelimiterbgap", "Umathoverdelimitervgap", "Umathpunctbinspacing", "Umathpunctclosespacing", "Umathpunctinnerspacing", "Umathpunctopenspacing", "Umathpunctopspacing", "Umathpunctordspacing", "Umathpunctpunctspacing", "Umathpunctrelspacing", "Umathquad", "Umathradicaldegreeafter", "Umathradicaldegreebefore", "Umathradicaldegreeraise", "Umathradicalkern", "Umathradicalrule", "Umathradicalvgap", "Umathrelbinspacing", "Umathrelclosespacing", "Umathrelinnerspacing", "Umathrelopenspacing", "Umathrelopspacing", "Umathrelordspacing", "Umathrelpunctspacing", "Umathrelrelspacing", "Umathskewedfractionhgap", "Umathskewedfractionvgap", "Umathspaceafterscript", "Umathspacebeforescript", "Umathspacingmode", "Umathstackdenomdown", "Umathstacknumup", "Umathstackvgap", "Umathsubshiftdown", "Umathsubshiftdrop", "Umathsubsupshiftdown", "Umathsubsupvgap", "Umathsubtopmax", "Umathsupbottommin", "Umathsupshiftdrop", "Umathsupshiftup", "Umathsupsubbottommax", "Umathunderbarkern", "Umathunderbarrule", "Umathunderbarvgap", "Umathunderdelimiterbgap", "Umathunderdelimitervgap", "Umiddle", "Unosubprescript", "Unosubscript", "Unosuperprescript", "Unosuperscript", "Uover", "Uoverdelimiter", "Uoverwithdelims", "Uradical", "Uright", "Uroot", "Uskewed", "Uskewedwithdelims", "Ustack", "Ustartdisplaymath", "Ustartmath", "Ustopdisplaymath", "Ustopmath", "Ustyle", "Usubprescript", "Usubscript", "Usuperprescript", "Usuperscript", "Uunderdelimiter", "Uvextensible", "adjustspacing", "adjustspacingshrink", "adjustspacingstep", "adjustspacingstretch", "afterassigned", "aftergrouped", "aliased", "alignmark", "aligntab", "atendofgroup", "atendofgrouped", "attribute", "attributedef", "automaticdiscretionary", "automatichyphenpenalty", "automigrationmode", "begincsname", "beginlocalcontrol", "boundary", "boxattribute", "boxdirection", "boxorientation", "boxtotal", "boxxmove", "boxxoffset", "boxymove", "boxyoffset", "catcodetable", "clearmarks", "crampeddisplaystyle", "crampedscriptscriptstyle", "crampedscriptstyle", "crampedtextstyle", "csstring", "defcsname", "dimensiondef", "directlua", "edefcsname", "efcode", "endlocalcontrol", "enforced", "etoksapp", "etokspre", "everytab", "exceptionpenalty", "expand", "expandafterpars", "expandafterspaces", "expandcstoken", "expanded", "expandtoken", "explicitdiscretionary", "explicithyphenpenalty", "firstvalidlanguage", "fontid", "fontspecifiedsize", "formatname", "frozen", "futuredef", "futureexpand", "futureexpandis", "futureexpandisap", "gdefcsname", "gleaders", "glet", "gletcsname", "gluespecdef", "glyphdatafield", "glyphoptions", "glyphscale", "glyphscriptfield", "glyphscriptscale", "glyphscriptscriptscale", "glyphstatefield", "glyphtextscale", "glyphxoffset", "glyphxscale", "glyphyoffset", "glyphyscale", "gtoksapp", "gtokspre", "hjcode", "hpack", "hyphenationmin", "hyphenationmode", "ifabsdim", "ifabsnum", "ifarguments", "ifboolean", "ifchkdim", "ifchknum", "ifcmpdim", "ifcmpnum", "ifcondition", "ifcstok", "ifdimval", "ifempty", "ifflags", "ifhastok", "ifhastoks", "ifhasxtoks", "ifincsname", "ifmathparameter", "ifmathstyle", "ifnumval", "ifparameter", "ifparameters", "ifrelax", "iftok", "ignorearguments", "ignorepars", "immediate", "immutable", "initcatcodetable", "insertheights", "insertht", "instance", "integerdef", "lastarguments", "lastnamedcs", "lastnodesubtype", "leftmarginkern", "letcharcode", "letcsname", "letfrozen", "letprotected", "linedirection", "linepar", "listcallbackmode", "localbrokenpenalty", "localcontrol", "localcontrolled", "localinterlinepenalty", "localleftbox", "localrightbox", "lpcode", "luabytecode", "luabytecodecall", "luacopyinputnodes", "luadef", "luaescapestring", "luafunction", "luafunctioncall", "luatexbanner", "luatexrevision", "luatexversion", "mathdelimitersmode", "mathdirection", "mathdisplayskipmode", "matheqnogapstep", "mathflattenmode", "mathitalicsmode", "mathnolimitsmode", "mathpenaltiesmode", "mathrulesfam", "mathrulesmode", "mathrulethicknessmode", "mathscale", "mathscriptboxmode", "mathscriptcharmode", "mathscriptsmode", "mathstyle", "mathsurroundmode", "mathsurroundskip", "mugluespecdef", "mutable", "noaligned", "noboundary", "nohrule", "norelax", "normalizelinemode", "nospaces", "novrule", "orelse", "orunless", "outputbox", "overloaded", "overloadmode", "parametercount", "parattr", "pardirection", "permanent", "postexhyphenchar", "posthyphenchar", "prebinoppenalty", "predisplaygapfactor", "preexhyphenchar", "prehyphenchar", "prerelpenalty", "protrudechars", "protrusionboundary", "pxdimen", "quitvmode", "rightmarginkern", "rpcode", "savecatcodetable", "scantextokens", "setfontid", "snapshotpar", "supmarkmode", "swapcsvalues", "textdirection", "thewithoutunit", "tokenized", "toksapp", "tokspre", "tolerant", "tpack", "tracingfonts", "tracingmath", "undent", "unletfrozen", "unletprotected", "vpack", "wordboundary", "wrapuppar", "xdefcsname", "xtoksapp", "xtokspre" },
  ["omega"]={ "Omegaminorversion", "Omegarevision", "Omegaversion" },
  ["pdftex"]={ "ifpdfabsdim", "ifpdfabsnum", "ifpdfprimitive", "pdfadjustspacing", "pdfannot", "pdfcatalog", "pdfcolorstack", "pdfcolorstackinit", "pdfcompresslevel", "pdfcopyfont", "pdfcreationdate", "pdfdecimaldigits", "pdfdest", "pdfdestmargin", "pdfdraftmode", "pdfeachlinedepth", "pdfeachlineheight", "pdfendlink", "pdfendthread", "pdffirstlineheight", "pdffontattr", "pdffontexpand", "pdffontname", "pdffontobjnum", "pdffontsize", "pdfgamma", "pdfgentounicode", "pdfglyphtounicode", "pdfhorigin", "pdfignoreddimen", "pdfignoreunknownimages", "pdfimageaddfilename", "pdfimageapplygamma", "pdfimagegamma", "pdfimagehicolor", "pdfimageresolution", "pdfincludechars", "pdfinclusioncopyfonts", "pdfinclusionerrorlevel", "pdfinfo", "pdfinfoomitdate", "pdfinsertht", "pdflastannot", "pdflastlinedepth", "pdflastlink", "pdflastobj", "pdflastxform", "pdflastximage", "pdflastximagepages", "pdflastxpos", "pdflastypos", "pdflinkmargin", "pdfliteral", "pdfmajorversion", "pdfmapfile", "pdfmapline", "pdfminorversion", "pdfnames", "pdfnoligatures", "pdfnormaldeviate", "pdfobj", "pdfobjcompresslevel", "pdfomitcharset", "pdfomitcidset", "pdfoutline", "pdfoutput", "pdfpageattr", "pdfpagebox", "pdfpageheight", "pdfpageref", "pdfpageresources", "pdfpagesattr", "pdfpagewidth", "pdfpkfixeddpi", "pdfpkmode", "pdfpkresolution", "pdfprimitive", "pdfprotrudechars", "pdfpxdimen", "pdfrandomseed", "pdfrecompress", "pdfrefobj", "pdfrefxform", "pdfrefximage", "pdfreplacefont", "pdfrestore", "pdfretval", "pdfsave", "pdfsavepos", "pdfsetmatrix", "pdfsetrandomseed", "pdfstartlink", "pdfstartthread", "pdfsuppressoptionalinfo", "pdfsuppressptexinfo", "pdftexbanner", "pdftexrevision", "pdftexversion", "pdfthread", "pdfthreadmargin", "pdftracingfonts", "pdftrailer", "pdftrailerid", "pdfuniformdeviate", "pdfuniqueresname", "pdfvorigin", "pdfxform", "pdfxformattr", "pdfxformmargin", "pdfxformname", "pdfxformresources", "pdfximage" },
diff --git a/context/data/vscode/extensions/context/syntaxes/context-syntax-tex.json b/context/data/vscode/extensions/context/syntaxes/context-syntax-tex.json
index eb5c53e44..4a5efecb0 100644
--- a/context/data/vscode/extensions/context/syntaxes/context-syntax-tex.json
+++ b/context/data/vscode/extensions/context/syntaxes/context-syntax-tex.json
@@ -215,7 +215,7 @@
    ]
   },
   "primitive" : {
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)(?=[^a-zA-Z])",
+   "match" : 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max|Umathsubsupvgap|Umathsubsupshiftdown|Umathsubshiftdrop|Umathsubshiftdown|Umathstackvgap|Umathstacknumup|Umathstackdenomdown|Umathspacingmode|Umathspacebeforescript|Umathspaceafterscript|Umathskewedfractionvgap|Umathskewedfractionhgap|Umathrelrelspacing|Umathrelpunctspacing|Umathrelordspacing|Umathrelopspacing|Umathrelopenspacing|Umathrelinnerspacing|Umathrelclosespacing|Umathrelbinspacing|Umathradicalvgap|Umathradicalrule|Umathradicalkern|Umathradicaldegreeraise|Umathradicaldegreebefore|Umathradicaldegreeafter|Umathquad|Umathpunctrelspacing|Umathpunctpunctspacing|Umathpunctordspacing|Umathpunctopspacing|Umathpunctopenspacing|Umathpunctinnerspacing|Umathpunctclosespacing|Umathpunctbinspacing|Umathoverdelimitervgap|Umathoverdelimiterbgap|Umathoverbarvgap|Umathoverbarrule|Umathoverbarkern|Umathordrelspacing|Umathordpunctspacing|Umathordordspacing|Umathordopspacing|Umathordopenspacing|Umathordinnerspacing|Umathordclosespacing|Umathordbinspacing|Umathoprelspacing|Umathoppunctspacing|Umathopordspacing|Umathopopspacing|Umathopopenspacing|Umathopinnerspacing|Umathoperatorsize|Umathopenrelspacing|Umathopenpunctspacing|Umathopenordspacing|Umathopenopspacing|Umathopenopenspacing|Umathopeninnerspacing|Umathopenclosespacing|Umathopenbinspacing|Umathopclosespacing|Umathopbinspacing|Umathnolimitsupfactor|Umathnolimitsubfactor|Umathlimitbelowvgap|Umathlimitbelowkern|Umathlimitbelowbgap|Umathlimitabovevgap|Umathlimitabovekern|Umathlimitabovebgap|Umathinnerrelspacing|Umathinnerpunctspacing|Umathinnerordspacing|Umathinneropspacing|Umathinneropenspacing|Umathinnerinnerspacing|Umathinnerclosespacing|Umathinnerbinspacing|Umathfractionrule|Umathfractionnumvgap|Umathfractionnumup|Umathfractiondenomvgap|Umathfractiondenomdown|Umathfractiondelsize|Umathconnectoroverlapmin|Umathcodenum|Umathcode|Umathcloserelspacing|Umathclosepunctspacing|Umathcloseordspacing|Umathcloseopspacing|Umathcloseopenspacing|Umathcloseinnerspacing|Umathcloseclosespacing|Umathclosebinspacing|Umathclass|Umathcharslot|Umathcharnumdef|Umathcharnum|Umathcharfam|Umathchardef|Umathcharclass|Umathchar|Umathbinrelspacing|Umathbinpunctspacing|Umathbinordspacing|Umathbinopspacing|Umathbinopenspacing|Umathbininnerspacing|Umathbinclosespacing|Umathbinbinspacing|Umathaxis|Umathaccentbaseheight|Umathaccent|Uleft|Uhextensible|Udelimiterunder|Udelimiterover|Udelimiter|Udelcodenum|Udelcode|Uchar|Uatopwithdelims|Uatop|Uabovewithdelims|Uabove|UUskewedwithdelims|UUskewed|Omegaversion|Omegarevision|Omegaminorversion|Alephversion|Alephrevision|Alephminorversion| )(?=[^a-zA-Z])",
    "name" : "context.primitive.commands.primitive.tex"
   },
   "reserved" : {
diff --git a/doc/context/documents/general/manuals/lowlevel-characters.pdf b/doc/context/documents/general/manuals/lowlevel-characters.pdf
new file mode 100644
index 000000000..70f8e57c3
--- /dev/null
+++ b/doc/context/documents/general/manuals/lowlevel-characters.pdf
diff --git a/doc/context/sources/general/manuals/lowlevel/lowlevel-characters.tex b/doc/context/sources/general/manuals/lowlevel/lowlevel-characters.tex
new file mode 100644
index 000000000..3915e0bed
--- /dev/null
+++ b/doc/context/sources/general/manuals/lowlevel/lowlevel-characters.tex
@@ -0,0 +1,239 @@
+% language=us
+
+\environment lowlevel-style
+
+\startdocument
+  [title=characters,
+   color=middlered]
+
+\startsection[title=Introduction]
+
+This explanation is part of the low level manuals because in practice users will
+not have to deal with these matters in \MKIV\ and even less in \LMTX. You can
+skip to the last section for commands.
+
+\stopsection
+
+\startsection[title=History]
+
+If we travel back in time to when \TEX\ was written we end up in eight bit
+character universe. In fact, the first versions assumed seven bits, but for
+comfortable use with languages other than English that was not sufficient.
+Support for eight bits permits the usage of so called code pages as supported by
+operating systems. Although \ASCII\ input became kind of the standard soon
+afterwards, the engine can be set up for different encodings. This is not only
+true for \TEX, but for many of its companions, like \METAFONT\ and therefore
+\METAPOST. \footnote {This remapping to an internal representation (e.g. ebcdic)
+is not present in \LUATEX\ where we assume \UTF8 to be the input encoding. The
+\METAPOST\ library that comes with \LUATEX\ still has that code but in
+\LUAMETATEX\ it's gone. There one can set up the machinery to be \UTF8 aware
+too.}
+
+Core components of a \TEX\ engine are hyphenation of words, applying
+inter|-|character kerns and build ligatures. In traditional \TEX\ engines those
+processes are interwoven into the par builder but in \LUATEX\ these are separate
+stages. The original approach is the reason that there is a relation between the
+input encoding and the font encoding: the character in the input is the slot used
+in a reference to a glyph. When producing the final result (e.g.\ \PDF) there can
+also be a mapping to an index in a font resource.
+
+\starttyping
+input A [tex ->] font slot A [backend ->] glyph index A
+\stoptyping
+
+The mapping that \TEX\ does is normally one|-|to|-|one but an input character can
+undergo some transformation. For instance a character beyond \ASCII\ 126 can be
+made active and expand to some character number that then becomes the font slot.
+So, it is the expansion (or meaning) of a character that end up as numeric
+reference in the glyph node. Virtual fonts can introduce yet another remapping
+but that's only visible in the backend.
+
+Actually, in \LUATEX\ the same happens but in practice there is no need to go
+active because (at least in \CONTEXT) we assume a \UNICODE\ path so there the
+font slot is the \UNICODE\ got from the \UTF8 input.
+
+In the eight bit universe macro packages (have to) provide all kind of means to
+deal with (in the perspective of English) special characters. For instance, \type
+{\"a} would put a diaeresis on top of the a or even better, refer to a character
+in the encoding that the chosen font provides. Because there are some limitations
+of what can go in an eight bit font, and because in different countries the used
+\TEX\ fonts evolved kind of independent, we ended up with quite some different
+variants of fonts. It was only with the Latin Modern project that this became
+better. Interesting is that when we consider the fact that such a font has often
+also hardly used symbols (like registered or copyright) coming up with an
+encoding vector that covers most (latin based) European languages (scripts) is
+not impossible \footnote {And indeed in the Latin Modern project we came up with
+one but it was already to late for it to become popular.} Special symbols could
+simply go into a dedicated font, also because these are always accessed via a
+macro so who cares about the input. It never happened.
+
+Keep in mind that when \UTF8 is used with eight bit engines, \CONTEXT\ will
+convert sequences of characters into a slot in a font (depending on the font
+encoding used which itself depends on the coverage needed). For this every first
+(possible) byte of a multibyte \UTF\ sequence is an active character, which is no
+big deal because these are outside the \ASCII\ range. Normal \ASCII\ characters
+are single byte \UTF\ sequences and fall through without treatment.
+
+Anyway, in \CONTEXT\ \MKII\ we dealt with this by supporting mixed encodings,
+depending on the (local) language, referencing the relevant font. It permits
+users to enter the text in their preferred input encoding and also get the words
+properly hyphenated. But we can leave these \MKII\ details behind.
+
+\stopsection
+
+\startsection[title=The heritage]
+
+In \MKIV\ we got rid of input and font encodings, although one can still load
+files in a specific code page. \footnote {I'm not sure if users ever depend on an
+input encoding different from \UTF8.} We also kept the means to enter special
+characters, if only because text editors seldom support(ed) a wide range of
+visual editing of those. This is why we still have
+
+\starttyping[option=TEX]
+\"u \^a \v{s} \AE \ij \eacute \oslash
+\stoptyping
+
+and many more. The ones with one character names are rather common in the \TEX\
+community but it is definitely a weird mix of symbols. The next two are kind of
+outdated: in these days you delegate that to the font handler, where turning them
+into \quote {single} character references depends on what the font offers, how it
+is set up with respect to (for instance) ligatures, and even might depend on
+language or script.
+
+The ones with the long names partly are tradition, but as we have a lot of them,
+in \MKII\ they actually serve a purpose. These verbose names are used in the so
+called encoding vectors and are part of the \UTF\ expansion vectors. They are
+also used in labels so that we have a good indication if what goes in there:
+remember that in those times editors often didn't show characters, unless the
+font for display had them, or the operating system somehow provided them from
+another font. These verbose names are used for latin, greek and cyrillic and for
+some other scripts and symbols. They take up quite a bit of hash space and the
+format file. \footnote {In \MKII\ we have an abstract front|-|end with respect to
+encodings and also an abstract backend with respect to supported drivers but both
+approaches no longer make sense today.}
+
+\stopsection
+
+\startsection[title=The \LMTX\ approach]
+
+In the process of tagging all (public) macros in \LMTX\ (which happened in
+2020|-|2021) I wondered if we should keep these one character macros, the
+references to special characters and the verbose ones. When asked on the mailing
+list it became clear that users still expect the short ones to be present, often
+just because old \BIBTEX\ files are used that might need them. However, in \MKIV\
+and \LMTX\ we load \BIBTEX\ files in a way that turn these special character
+references into proper \UTF8 input so it makes a weak argument. Anyway, although
+they could go, for now we keep them because users expect them. However, in \LMTX\
+the implementation is somewhat different now, a bit more efficient in terms of
+hash and memory, potentially a bit less efficient in runtime, but no one will
+notice that.
+
+A new command has been introduced, the very short \type {\chr}.
+
+\startbuffer
+\chr {à} \chr {á} \chr {ä}
+\chr {`a} \chr {'a} \chr {"a}
+\chr {a acute} \chr {a grave} \chr {a umlaut}
+\chr {aacute}  \chr {agrave}  \chr {aumlaut}
+\stopbuffer
+
+\typebuffer[option=TEX]
+
+In the first line the composed character using two characters, a base and a so
+called mark. Actually, one doesn't have to use \type {\chr} in that case because
+\CONTEXT\ does already collapse characters for you. The second line looks like
+the shortcuts \type {\`}, \type {\'} and \type {\"}. The third and fourth lines
+could eventually replace the more symbolic long names, if we feel the need. Watch
+out: in \UNICODE\ input the marks come {\em after}.
+
+\startlines \getbuffer \stoplines
+
+Currently the repertoire is somewhat limited but it can be easily be extended. It
+all depends on user needs (doing Greek and Cyrillic for instance). The reason why
+we actually save code deep down is that the helpers for this have always been
+there. \footnote {So if needed I can port this approach back to \MKIV, but for
+now we keep it as is because we then have a reference.}
+
+The \type {\"} commands are now just aliases to more verbose and less hackery
+looking macros:
+
+\starttabulate[|||||]
+    \NC \type {\withgrave}        \NC \withgrave       {a} \NC \type {\`} \NC \`{a} \NC \NR
+    \NC \type {\withacute}        \NC \withacute       {a} \NC \type {\'} \NC \'{a} \NC \NR
+    \NC \type {\withcircumflex}   \NC \withcircumflex  {a} \NC \type {\^} \NC \^{a} \NC \NR
+    \NC \type {\withtilde}        \NC \withtilde       {a} \NC \type {\~} \NC \~{a} \NC \NR
+    \NC \type {\withmacron}       \NC \withmacron      {a} \NC \type {\=} \NC \={a} \NC \NR
+    \NC \type {\withbreve}        \NC \withbreve       {e} \NC \type {\u} \NC \u{e} \NC \NR
+    \NC \type {\withdotaccent}    \NC \withdot         {c} \NC \type {\.} \NC \.{c} \NC \NR
+    \NC \type {\withdiaeresis}    \NC \withdieresis    {e} \NC \type {\"} \NC \"{e} \NC \NR
+    \NC \type {\withring}         \NC \withring        {u} \NC \type {\r} \NC \r{u} \NC \NR
+    \NC \type {\withhungarumlaut} \NC \withhungarumlaut{u} \NC \type {\H} \NC \H{u} \NC \NR
+    \NC \type {\withcaron}        \NC \withcaron       {e} \NC \type {\v} \NC \v{e} \NC \NR
+    \NC \type {\withcedilla}      \NC \withcedilla     {e} \NC \type {\c} \NC \c{e} \NC \NR
+    \NC \type {\withogonek}       \NC \withogonek      {e} \NC \type {\k} \NC \k{e} \NC \NR
+\stoptabulate
+
+Not all fonts have these special characters. Most natural is to have them
+available as precomposed single glyphs, but it can be that they are just two
+shapes with the marks anchored to the base. It can even be that the font somehow
+overlays them, assuming (roughly) equal widths. The \type {compose} font feature
+in \CONTEXT\ normally can handle most well.
+
+An occasional ugly rendering doesn't matter that much: better have something than
+nothing. But when it's the main language (script) that needs them you'd better
+look for a font that handles them. When in doubt, in \CONTEXT\ you can enable
+checking:
+
+\starttabulate[|l|l|]
+    \BC command                           \BC equivalent to \NC \NR
+    \NC \type {\checkmissingcharacters}   \NC \type{\enabletrackers[fonts.missing]} \NC \NR
+    \NC \type {\removemissingcharacters}  \NC \type{\enabletrackers[fonts.missing=remove]} \NC \NR
+    \NC \type {\replacemissingcharacters} \NC \type{\enabletrackers[fonts.missing=replace]} \NC \NR
+    \NC \type {\handlemissingcharacters}  \NC \type{\enabletrackers[fonts.missing={decompose,replace}]} \NC \NR
+\stoptabulate
+
+The decompose variant will try to turn a composed character into its components
+so that at least you get something. If that fails it will inject a replacement
+symbol that stands out so that you can check it. The console also mentions
+missing glyphs. You don't need to enable this by default \footnote {There is some
+overhead involved here.} but you might occasionally do it when you use a font for
+the first time.
+
+In \LMTX\ this mechanism has been upgraded so that replacements follow the shape
+and are actually real characters. The decomposition has not yet been ported back
+to \MKIV.
+
+\stopsection
+
+\startsubject[title=Colofon]
+
+\starttabulate
+\NC Author      \NC Hans Hagen         \NC \NR
+\NC \CONTEXT    \NC \contextversion    \NC \NR
+\NC \LUAMETATEX \NC \texengineversion  \NC \NR
+\NC Support     \NC www.pragma-ade.com \NC \NR
+\NC             \NC contextgarden.net  \NC \NR
+\stoptabulate
+
+\stopsubject
+
+\stopdocument
+
+% on an old machine, so consider them just relative measures
+%
+% mkiv  lmtx
+%
+% 0.012 0.009 % faster core code
+% 0.028 0.036 % different io code path
+% 0.055 0.043 % different io code path / faster core code
+% 0.156 0.129 % more efficient resolving
+% 0.153 0.119 % more efficient resolving
+%
+% \ifdefined\withdieresis\else\let\withdieresis\"\fi % for mkiv
+%
+% \setbox0\hpack{\testfeatureonce{100000}{ü}}                \par \elapsedtime \par % direct
+% \setbox0\hpack{\testfeatureonce{100000}{ü}}                \par \elapsedtime \par % composed (input)
+% \setbox0\hpack{\testfeatureonce{100000}{u{}̈}}              \par \elapsedtime \par % overlay
+% \setbox0\hpack{\testfeatureonce{100000}{\withdieresis{u}}} \par \elapsedtime \par % official also \"u
+% \setbox0\hpack{\testfeatureonce{100000}{\" u}}             \par \elapsedtime \par % alias of previous
+
diff --git a/doc/context/sources/general/manuals/lowlevel/lowlevel-conditionals.tex b/doc/context/sources/general/manuals/lowlevel/lowlevel-conditionals.tex
index c7a7834ba..9be2fb4ec 100644
--- a/doc/context/sources/general/manuals/lowlevel/lowlevel-conditionals.tex
+++ b/doc/context/sources/general/manuals/lowlevel/lowlevel-conditionals.tex
@@ -1123,13 +1123,15 @@ This test is like \type {\ifcmpnum} but for dimensions.
 
 \startsubsection[title={\tex{ifchkdim}}]
 
-This test is like \type {\ifchknum} but for dimensions.
+This test is like \type {\ifchknum} but for dimensions. The last checked value is
+available as \type {\lastchknum}.
 
 \stopsubsection
 
 \startsubsection[title={\tex{ifdimval}}]
 
-This test is like \type {\ifnumval} but for dimensions.
+This test is like \type {\ifnumval} but for dimensions. The last checked value is
+available as \type {\lastchkdim}
 
 \stopsubsection
 
diff --git a/doc/context/sources/general/manuals/luametatex/luametatex-enhancements.tex b/doc/context/sources/general/manuals/luametatex/luametatex-enhancements.tex
index 43bb0429a..5480a4e3c 100644
--- a/doc/context/sources/general/manuals/luametatex/luametatex-enhancements.tex
+++ b/doc/context/sources/general/manuals/luametatex/luametatex-enhancements.tex
@@ -1108,6 +1108,9 @@ or more than zero.
 
 \typebuffer \blank {\tt \getbuffer} \blank
 
+The last checked values are available in \lpr {lastchknum} and \lpr {lastchkdim}.
+These don't obey grouping.
+
 \stopsubsection
 
 \startsubsection[title={\lpr {ifmathstyle} and \lpr {ifmathparameter}}]
diff --git a/tex/context/base/mkii/cont-new.mkii b/tex/context/base/mkii/cont-new.mkii
index e2adc3d91..f761ac5da 100644
--- a/tex/context/base/mkii/cont-new.mkii
+++ b/tex/context/base/mkii/cont-new.mkii
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2021.02.05 17:41}
+\newcontextversion{2021.02.08 16:58}
 
 %D This file is loaded at runtime, thereby providing an
 %D excellent place for hacks, patches, extensions and new
diff --git a/tex/context/base/mkii/context.mkii b/tex/context/base/mkii/context.mkii
index 1c2b39e53..370bcbd2b 100644
--- a/tex/context/base/mkii/context.mkii
+++ b/tex/context/base/mkii/context.mkii
@@ -20,7 +20,7 @@
 %D your styles an modules.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2021.02.05 17:41}
+\edef\contextversion{2021.02.08 16:58}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/mkii/mult-ro.mkii b/tex/context/base/mkii/mult-ro.mkii
index 21c69669f..e497b8d6b 100644
--- a/tex/context/base/mkii/mult-ro.mkii
+++ b/tex/context/base/mkii/mult-ro.mkii
@@ -774,6 +774,8 @@
 \setinterfaceconstant{deepnumbercommand}{deepnumbercommand}
 \setinterfaceconstant{deeptextcommand}{deeptextcommand}
 \setinterfaceconstant{default}{implicit}
+\setinterfaceconstant{defaultheight}{defaultheight}
+\setinterfaceconstant{defaultwidth}{defaultwidth}
 \setinterfaceconstant{define}{define}
 \setinterfaceconstant{delay}{intarziere}
 \setinterfaceconstant{depth}{inaltime}
@@ -1118,6 +1120,7 @@
 \setinterfaceconstant{print}{print}
 \setinterfaceconstant{printable}{tiparibil}
 \setinterfaceconstant{process}{process}
+\setinterfaceconstant{processors}{processors}
 \setinterfaceconstant{profile}{profile}
 \setinterfaceconstant{properties}{properties}
 \setinterfaceconstant{pubsep}{pubsep}
diff --git a/tex/context/base/mkiv/cont-new.mkiv b/tex/context/base/mkiv/cont-new.mkiv
index dfe225db7..cf28adc74 100644
--- a/tex/context/base/mkiv/cont-new.mkiv
+++ b/tex/context/base/mkiv/cont-new.mkiv
@@ -13,7 +13,7 @@
 
 % \normalend % uncomment this to get the real base runtime
 
-\newcontextversion{2021.02.05 17:41}
+\newcontextversion{2021.02.08 16:58}
 
 %D This file is loaded at runtime, thereby providing an excellent place for hacks,
 %D patches, extensions and new features. There can be local overloads in cont-loc
diff --git a/tex/context/base/mkiv/context.mkiv b/tex/context/base/mkiv/context.mkiv
index 7ce8e0ca0..70860c06e 100644
--- a/tex/context/base/mkiv/context.mkiv
+++ b/tex/context/base/mkiv/context.mkiv
@@ -45,7 +45,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2021.02.05 17:41}
+\edef\contextversion{2021.02.08 16:58}
 
 %D Kind of special:
 
diff --git a/tex/context/base/mkiv/mult-prm.lua b/tex/context/base/mkiv/mult-prm.lua
index e89571217..250a5dfc1 100644
--- a/tex/context/base/mkiv/mult-prm.lua
+++ b/tex/context/base/mkiv/mult-prm.lua
@@ -32,6 +32,8 @@ return {
   "iffontchar",
   "interactionmode",
   "interlinepenalties",
+  "lastchkdim",
+  "lastchknum",
   "lastlinefit",
   "lastnodetype",
   "marks",
diff --git a/tex/context/base/mkiv/status-files.pdf b/tex/context/base/mkiv/status-files.pdf
index 35efbfdcb..1440a78aa 100644
--- a/tex/context/base/mkiv/status-files.pdf
+++ b/tex/context/base/mkiv/status-files.pdf
diff --git a/tex/context/base/mkiv/status-lua.pdf b/tex/context/base/mkiv/status-lua.pdf
index b5fcc04ae..c7fe78f1c 100644
--- a/tex/context/base/mkiv/status-lua.pdf
+++ b/tex/context/base/mkiv/status-lua.pdf
diff --git a/tex/context/base/mkxl/char-tex.lmt b/tex/context/base/mkxl/char-tex.lmt
index 5d2883f21..918b6cc39 100644
--- a/tex/context/base/mkxl/char-tex.lmt
+++ b/tex/context/base/mkxl/char-tex.lmt
@@ -292,9 +292,9 @@ local ligaturemapping = allocate {
 }
 
 -- Older accent handling code can be found in char-def.lua but in the meantime
--- we moved on.
+-- we moved on. First the one with commands:
 
-local untex
+local untex, pattern
 
 local function toutfpattern()
     if not untex then
@@ -325,16 +325,12 @@ local function toutfpattern()
     return untex
 end
 
-texcharacters.toutfpattern = toutfpattern
-
-local pattern = nil
-
 local function prepare()
     pattern = Cs((toutfpattern() + P(1))^0)
     return pattern
 end
 
-function texcharacters.toutf(str,strip)
+local function textoutf(str,strip)
     if str == "" then
         return str
     elseif not find(str,"\\",1,true) then
@@ -345,6 +341,9 @@ function texcharacters.toutf(str,strip)
     end
 end
 
+texcharacters.toutfpattern = toutfpattern
+texcharacters.toutf        = textoutf
+
 -- print(texcharacters.toutf([[\~{Z}]],true))
 -- print(texcharacters.toutf([[\'\i]],true))
 -- print(texcharacters.toutf([[\'{\i}]],true))
@@ -358,6 +357,105 @@ end
 -- print(texcharacters.toutf([[fo{\"o}{\ss}ar]],true))
 -- print(texcharacters.toutf([[H{\'a}n Th\^e\llap{\raise 0.5ex\hbox{\'{\relax}}} Th{\'a}nh]],true))
 
+-- Next the ones without backslash
+
+local untex, pattern
+
+local function toutfpattern()
+    if not untex then
+        local hash = { }
+        for k, v in next, accentmapping do
+            for kk, vv in next, v do
+                hash[k..kk] = vv
+            end
+        end
+        for k, v in next, commandmapping do
+            hash[k] = v
+        end
+        for k, v in next, ligaturemapping do
+            hash[k] = v
+        end
+        untex = utfchartabletopattern(hash) / hash
+    end
+    return untex
+end
+
+local function prepare()
+    pattern = Cs((toutfpattern() + P(1))^0)
+    return pattern
+end
+
+local function textoutf(str)
+    return lpegmatch(pattern or prepare(),str)
+end
+
+texcharacters.strtoutfpattern = toutfpattern
+texcharacters.strtextoutf     = textoutf
+
+local collapse = utffilters.collapse
+
+--
+
+local pattern
+
+local hash = {
+    ["acute"]              = "́",  -- 0x300
+    ["breve"]              = "̆",  -- 0x301
+    ["caron"]              = "̌",  -- 0x302
+    ["cedilla"]            = "̧",  -- 0x303
+    ["circumflex"]         = "̂",  -- 0x304
+    ["diaeresis"]          = "̈",  -- 0x305
+    ["dieresis"]           = "̈",  -- 0x305
+    ["umlaut"]             = "̈",  -- 0x305
+    ["dot"]                = "̇",  -- 0x306
+    ["doublegrave"]        = "̏",  -- 0x307
+    ["doubleverticalline"] = "̎",  -- 0x308
+    ["grave"]              = "̀",  -- 0x309
+    ["hook"]               = "̉",  -- 0x30A
+    ["hungarumlaut"]       = "̋",  -- 0x30B
+    ["macron"]             = "̄",  -- 0x30C
+    ["ogonek"]             = "̨", -- 0x30D -- hm
+    ["overline"]           = "̅",  -- 0x30E
+    ["ring"]               = "̊",  -- 0x30F
+    ["tilde"]              = "̃",  -- 0x327
+    ["verticalline"]       = "̍",  -- 0x328
+}
+
+local function prepare()
+    pattern = Cs((utfchartabletopattern(hash) / hash + lpegpatterns.space/"" + lpegpatterns.utf8character)^0)
+    return pattern
+end
+
+local hash = table.setmetatableindex(function(t,k)
+    local f = ""
+    k = lpegmatch(pattern or prepare(),k) or k
+    local v = collapse(k) or k
+    if k == v then
+        v = commandmapping[k] or k
+        if k ~= v then
+            f = "\\"
+        end
+    end
+    if k == v then
+        v = textoutf(k) or k
+        if k ~= v then
+            f = "\\"
+        end
+    end
+    report_defining("instead of old school '%s%s' you can input the utf sequence %s",f,k,v)
+    t[k] = v
+    return v
+end)
+
+interfaces.implement {
+    name      = "chr",
+    arguments = "argument",
+    public    = true,
+    actions   = function(str)
+        context(hash[str]) -- expandable
+    end
+}
+
 function texcharacters.safechar(n) -- was characters.safechar
     local c = data[n]
     if c and c.contextname then
@@ -389,16 +487,28 @@ local ctxcatcodes   = catcodes.numbers.ctxcatcodes
 local texsetmacro   = tokens.setters.macro
 local texsetchar    = tokens.setters.char
 
+-- function texcharacters.defineaccents()
+--     local ctx_dodefineaccentcommand  = context.dodefineaccent
+--     local ctx_dodefineaccent         = context.dodefineaccent
+--     local ctx_dodefinecommand        = context.dodefinecommand
+--     for accent, group in next, accentmapping do
+--         ctx_dodefineaccentcommand(accent)
+--         for character, mapping in next, group do
+--             ctx_dodefineaccent(accent,character,mapping)
+--         end
+--     end
+--     for command, mapping in next, commandmapping do
+--         ctx_dodefinecommand(command,mapping)
+--     end
+--     os.exit()
+-- end
+
 function texcharacters.defineaccents()
-    local ctx_dodefineaccentcommand = context.dodefineaccentcommand
-    local ctx_dodefineaccent        = context.dodefineaccent
-    local ctx_dodefinecommand       = context.dodefinecommand
-    for accent, group in next, accentmapping do
-        ctx_dodefineaccentcommand(accent)
-        for character, mapping in next, group do
-            ctx_dodefineaccent(accent,character,mapping)
-        end
-    end
+ -- local ctx_dodefinecombine = context.dodefinecombine
+    local ctx_dodefinecommand = context.dodefinecommand
+ -- for accent, group in next, accentmapping do
+ --     ctx_dodefinecombine(accent)
+ -- end
     for command, mapping in next, commandmapping do
         ctx_dodefinecommand(command,mapping)
     end
diff --git a/tex/context/base/mkxl/chem-str.mkxl b/tex/context/base/mkxl/chem-str.mkxl
index 03f006fdf..bd35ddb12 100644
--- a/tex/context/base/mkxl/chem-str.mkxl
+++ b/tex/context/base/mkxl/chem-str.mkxl
@@ -82,13 +82,12 @@
   [\c!align=\v!normal,
    \c!strut=\v!no]
 
+\mutable\let\currentdefinedchemical\empty
+
 \permanent\protected\def\setupchemicalframed
   {\setupframed[\??chemicalframed]}
 
-\permanent\protected\overloaded\def\definechemical % is global (so we don't use the commandhandler)
-  {\dosingleargument\chem_define}
-
-\def\chem_define[#1]#2%
+\permanent\protected\tolerant\overloaded\def\definechemical[#1]#:#2% is global (so we don't use the commandhandler)
   {\startnointerference
    \edef\currentdefinedchemical{#1}%
    \enforced\let\chemical\chem_chemical_nested
@@ -102,7 +101,7 @@
 % chemical symbols
 
 \permanent\tolerant\protected\def\definechemicalsymbol[#1]#*[#2]%
-  {\ifarguments\else\setvalue{\??chemicalsymbol#1}{#2}\fi}
+  {\ifarguments\else\defcsname\??chemicalsymbol#1\endcsname{#2}\fi}
 
 \permanent\protected\def\chemicalsymbol[#1]%
   {\csname\??chemicalsymbol\ifcsname\??chemicalsymbol#1\endcsname#1\else\s!unknown\fi\endcsname}
diff --git a/tex/context/base/mkxl/cont-new.mkxl b/tex/context/base/mkxl/cont-new.mkxl
index c130a9440..314016e36 100644
--- a/tex/context/base/mkxl/cont-new.mkxl
+++ b/tex/context/base/mkxl/cont-new.mkxl
@@ -13,7 +13,7 @@
 
 % \normalend % uncomment this to get the real base runtime
 
-\newcontextversion{2021.02.05 17:41}
+\newcontextversion{2021.02.08 16:58}
 
 %D This file is loaded at runtime, thereby providing an excellent place for hacks,
 %D patches, extensions and new features. There can be local overloads in cont-loc
diff --git a/tex/context/base/mkxl/context.mkxl b/tex/context/base/mkxl/context.mkxl
index abd86d3cd..6b6495394 100644
--- a/tex/context/base/mkxl/context.mkxl
+++ b/tex/context/base/mkxl/context.mkxl
@@ -29,7 +29,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \immutable\edef\contextformat {\jobname}
-\immutable\edef\contextversion{2021.02.05 17:41}
+\immutable\edef\contextversion{2021.02.08 16:58}
 
 %overloadmode 1 % check frozen / warning
 %overloadmode 2 % check frozen / error
diff --git a/tex/context/base/mkxl/enco-ini.mkxl b/tex/context/base/mkxl/enco-ini.mkxl
index 24ebc92a1..169f49465 100644
--- a/tex/context/base/mkxl/enco-ini.mkxl
+++ b/tex/context/base/mkxl/enco-ini.mkxl
@@ -49,16 +49,67 @@
 
 \installcorenamespace{accents}
 
+%D These will go away:
+
 \permanent\protected\def\defineaccent#1 #2 #3 %
   {\dodefineaccentcommand{#1}%
    \dodefineaccent{#1}{#2}{#3}}
 
 \permanent\protected\def\dodefineaccentcommand#1%
-  {\setevalue{\string#1}{\noexpand\dohandleaccent{\string#1}}}
+  {\ifcsname\string#1\endcsname\else
+     \setevalue{\string#1}{\noexpand\dohandleaccent{\string#1}}%
+   \fi}
 
 \permanent\protected\def\dodefineaccent#1#2#3% no spaces, used low level
   {\setvalue{\??accents\string#1\string#2\empty}{#3}}
 
+%D Because now have this (\type {\chr} issues a one|-|time warning):
+
+% \permanent\protected\def\dodefinecombine#1% \" \' \. \= \H \^ \` \c \k \r \u \v \~
+%   {\ifcsname\string#1\endcsname\else
+%      % for now permanent even as these are kind of obsolete
+%      \permanent\protected\edefcsname\string#1\endcsname##1{\noexpand\chr{\string#1##1}}%
+%    \fi}
+
+%D But, we now go for this:
+
+\permanent\protected\edef\withgrave             #1{\noexpand\chr{#1\Uchar"300}} \aliased\let\` \withgrave
+\permanent\protected\edef\withacute             #1{\noexpand\chr{#1\Uchar"301}} \aliased\let\' \withacute
+\permanent\protected\edef\withcircumflex        #1{\noexpand\chr{#1\Uchar"302}} \aliased\let\^ \withcircumflex
+\permanent\protected\edef\withtilde             #1{\noexpand\chr{#1\Uchar"303}} \aliased\let\~ \withtilde
+\permanent\protected\edef\withmacron            #1{\noexpand\chr{#1\Uchar"304}} \aliased\let\= \withmacron
+% permanent\protected\edef\withoverline          #1{\noexpand\chr{#1\Uchar"305}}
+\permanent\protected\edef\withbreve             #1{\noexpand\chr{#1\Uchar"306}} \aliased\let\u \withbreve
+\permanent\protected\edef\withdot               #1{\noexpand\chr{#1\Uchar"307}} \aliased\let\. \withdot
+\permanent\protected\edef\withdieresis          #1{\noexpand\chr{#1\Uchar"308}} \aliased\let\" \withdieresis
+% permanent\protected\edef\withhook              #1{\noexpand\chr{#1\Uchar"309}}
+\permanent\protected\edef\withring              #1{\noexpand\chr{#1\Uchar"30A}} \aliased\let\r \withring
+\permanent\protected\edef\withhungarumlaut      #1{\noexpand\chr{#1\Uchar"30B}} \aliased\let\H \withhungarumlaut
+\permanent\protected\edef\withcaron             #1{\noexpand\chr{#1\Uchar"30C}} \aliased\let\v \withcaron
+% permanent\protected\edef\withverticalline      #1{\noexpand\chr{#1\Uchar"30D}}
+% permanent\protected\edef\withdoubleverticalline#1{\noexpand\chr{#1\Uchar"30E}}
+% permanent\protected\edef\withdoublegrave       #1{\noexpand\chr{#1\Uchar"30F}}
+\permanent\protected\edef\withcedilla           #1{\noexpand\chr{#1\Uchar"327}} \aliased\let\c \withcedilla
+\permanent\protected\edef\withogonek            #1{\noexpand\chr{#1\Uchar"328}} \aliased\let\k \withogonek
+
+\aliased\let\withdiaeresis\withdieresis
+
+% \starttabulate[||||]
+%     \NC \getvalue{agrave}        \NC \withgrave       {a} \NC \`{a} \NC \NR
+%     \NC \getvalue{aacute}        \NC \withacute       {a} \NC \'{a} \NC \NR
+%     \NC \getvalue{acircumflex}   \NC \withcircumflex  {a} \NC \^{a} \NC \NR
+%     \NC \getvalue{atilde}        \NC \withtilde       {a} \NC \~{a} \NC \NR
+%     \NC \getvalue{amacron}       \NC \withmacron      {a} \NC \={a} \NC \NR
+%     \NC \getvalue{ebreve}        \NC \withbreve       {e} \NC \u{e} \NC \NR
+%     \NC \getvalue{cdotaccent}    \NC \withdot         {c} \NC \.{c} \NC \NR
+%     \NC \getvalue{ediaeresis}    \NC \withdieresis    {e} \NC \"{e} \NC \NR
+%     \NC \getvalue{uring}         \NC \withring        {u} \NC \r{u} \NC \NR
+%     \NC \getvalue{uhungarumlaut} \NC \withhungarumlaut{u} \NC \H{u} \NC \NR
+%     \NC \getvalue{ecaron}        \NC \withcaron       {e} \NC \v{e} \NC \NR
+%     \NC \getvalue{ecedilla}      \NC \withcedilla     {e} \NC \c{e} \NC \NR
+%     \NC \getvalue{eogonek}       \NC \withogonek      {e} \NC \k{e} \NC \NR
+% \stoptabulate
+
 % the following dirty trick is needed to catch \asciimath{\^{1/5}log}:
 
 \permanent\protected\def\dohandleaccent#1#2% expandable because we want them in the tuc file
@@ -74,17 +125,21 @@
 
 \immutable\letvalue{\??accents}\empty
 
-\permanent\protected\def\dodefinecommand#1#2%
-  {\frozen\setuvalue{\string#1}{#2}} % not permanent as these are kind of obsolete
-
 \permanent\protected\def\definecharacter#1 #2 %
   {\doifelsenumber{\string#2}
      {\setevalue{\string#1}{\utfchar{#2}}} % or {\expandafter\chardef\csname#1\endcsname#2\relax}
      {\setuvalue{\string#1}{#2}}}
 
+%D specials: \aa \ae \cc \i \ij \l \o \oe \sz \par
+%D SPECIALS: \AA \AE \CC \j \IJ \L \O \OE \SZ \par
+
 \permanent\protected\def\definecommand#1 #2 %
   {\setuvalue{\string#1}{#2}}
 
+\permanent\protected\def\dodefinecommand#1#2% \O \L \AE ...
+  {% not permanent as these are kind of obsolete
+   \frozen\protected\defcsname\string#1\endcsname{#2}}
+
 %D \macros
 %D   {everyuppercase, everylowercase, everysanitize}
 
diff --git a/tex/context/base/mkxl/font-chk.lmt b/tex/context/base/mkxl/font-chk.lmt
index 9f5aa2aab..6f927e097 100644
--- a/tex/context/base/mkxl/font-chk.lmt
+++ b/tex/context/base/mkxl/font-chk.lmt
@@ -76,8 +76,10 @@ local nextglyph            = nuts.traversers.glyph
 
 local remove_node          = nuts.remove
 local insert_node_after    = nuts.insert_after
+local insert_node_before   = nuts.insert_before
+local copy_node            = nuts.copy
 
-local action = false
+local actions = false
 
 -- to tfmdata.properties ?
 
@@ -149,78 +151,9 @@ table.setmetatableindex(mapping, { "MissingUnknown", "darkgray" })
 
 checkers.mapping = mapping
 
--- We provide access by (private) name for tracing purposes. We also need
--- to make sure the dimensions are known at the lua and tex end.
-
--- local cache = { }
---
--- local function add(tfmdata,name,color,size,collected)
---     local hash     = formatters["%s_%s_%i"](name,color,floor(size))
---     local chardata = cache[hash]
---     if not chardata then
---         local fake   = fakes[name]
---         local width  = size * fake.width
---         local height = size * fake.height
---         local depth  = size * fake.depth
---         chardata = {
---             width    = width,
---             height   = height,
---             depth    = depth,
---             commands = {
---                 { "frame", width, height, depth, 65536/5, false, true, true, color },
---             }
---         }
---         cache[hash] = chardata
---     end
---     if not hasprivate(tfmdata,privatename) then
---         local privatename = formatters["placeholder %s %s"](name,color)
---         local privatecode = addprivate(tfmdata, privatename, chardata)
---         collected[privatecode] = chardata
---     end
---     return chardata
--- end
---
--- function checkers.placeholder(font,char)
---     local tfmdata    = fontdata[font or true]
---     local characters = tfmdata.characters
---     local size       = tfmdata.parameters.size
---     local scale      = size * bpfactor
---     local collected  = { }
---     local category   = chardata[char].category or "unknown"
---     local fakedata   = mapping[category]
---     local chardata   = add(tfmdata,fakedata[1],fakedata[2],size,collected)
---     collected [char] = chardata
---     characters[char] = chardata
---     addcharacters(font, { characters = collected })
---     return "char", char -- needed for math-noa
--- end
-
--- For old times sake we keep this: a whole bunch of fake symbols
-
--- local function addplaceholders(tfmdata,feature,value)
---     if value then
---         local properties = tfmdata.properties
---         local size       = tfmdata.parameters.size
---         local scale      = size * bpfactor
---         local collected  = { }
---         local colors     = { "darkred", "darkgreen", "darkblue", "darkcyan", "darkmagenta", "darkyellow", "darkgray" }
---         for name, v in sortedhash(fakes) do
---             for i=1,#colors do
---                 add(tfmdata,name,colors[i],size,collected)
---             end
---         end
---         if next(collected) then
---             local id = properties.id
---             if id then
---                 addcharacters(id, { characters = collected })
---             end
---         end
---     end
--- end
-
--- local chardata = characters.data
--- local fontdata = fonts.hashes.identifiers
--- local mapping  = fonts.checkers.mapping
+-- We provide access by (private) name for tracing purposes. We also need to make
+-- sure the dimensions are known at the lua and tex end. For previous variants see
+-- the mkiv files or older lmtx files. I decided to just drop the old stuff here.
 
 function checkers.placeholder(font,char)
     local category = chardata[char].category or "lu" -- todo: unknown
@@ -242,77 +175,84 @@ function checkers.placeholder(font,char)
     fonts.helpers.setmetaglyphs("missing", font, char, specification)
 end
 
--- registerotffeature {
---     name        = "missing",
---     description = "missing symbols",
---     default     = false,
---     manipulators = {
---         base = addplaceholders,
---         node = addplaceholders,
---     }
--- }
-
--- fonts.loggers.add_placeholders        = function(id) addplaceholders(fontdata[id or true]) end
--- fonts.loggers.category_to_placeholder = mapping
-
 function checkers.missing(head)
-    local lastfont   = nil
-    local characters = nil
-    if action == "replace" then
-        local addplaceholder = checkers.placeholder -- so we can overload
+    local lastfont       = nil
+    local characters     = nil
+    local found          = nil
+    local addplaceholder = checkers.placeholder -- so we can overload
+    if actions.replace or actions.decompose then
         for n, char, font in nextglyph, head do
             if font ~= lastfont then
                 lastfont   = font
                 characters = fontcharacters[font]
             end
             if font > 0 and not characters[char] and is_character[chardata[char].category or "unknown"] then
-                onetimemessage(font,char,"missing (will be flagged)")
-                local f, c = addplaceholder(font,char)
-                if f and c then
-                    setchar(head, c, f)
+                if actions.decompose then
+                    local c = chardata[char]
+                    if c then
+                        local s = c.specials
+                        if s and s[1] == "char" then
+                            local l = #s
+                            if l > 2 then
+                                -- check first
+                                local okay = true
+                                for i=2,l do
+                                    if not characters[s[i]] then
+                                        okay = false
+                                        break
+                                    end
+                                end
+                                if okay then
+                                    -- we work backward
+                                    local o = n -- we're not supposed to change n (lua 5.4+)
+                                    onetimemessage(font,char,"missing (decomposed)")
+                                    setchar(n,s[l])
+                                    for i=l-1,2,-1 do
+                                        head, o = insert_node_before(head,o,copy_node(n))
+                                        setchar(o,s[i])
+                                    end
+                                    goto DONE
+                                end
+                            end
+                        end
+                    end
                 end
-            end
-        end
-    elseif action == "remove" then
-        -- faster than while loop so we delay removal
-        local found = nil
-        for n, char, font in nextglyph, head do
-            if font ~= lastfont then
-                lastfont   = font
-                characters = fontcharacters[font]
-            end
-            if font > 0 and not characters[char] and is_character[chardata[char].category or "unknown"] then
-                onetimemessage(font,char,"missing (will be deleted)")
-                if not found then
-                    found = { n }
-                else
-                    found[#found+1] = n
+                if actions.replace then
+                    onetimemessage(font,char,"missing (replaced)")
+                    local f, c = addplaceholder(font,char)
+                    if f and c then
+                        setchar(n, c, f)
+                    end
+                    goto DONE
                 end
+                if actions.remove then
+                    onetimemessage(font,char,"missing (deleted)")
+                    if not found then
+                        found = { n }
+                    else
+                        found[#found+1] = n
+                    end
+                    goto DONE
+                end
+                onetimemessage(font,char,"missing (checked)")
+              ::DONE::
             end
         end
-        if found then
-            for i=1,#found do
-                head = remove_node(head,found[i],true)
-            end
-        end
-    else
-        for n, char, font in nextglyph, head do
-            if font ~= lastfont then
-                lastfont   = font
-                characters = fontcharacters[font]
-            end
-            if font > 0 and not characters[char] and is_character[chardata[char].category or "unknown"] then
-                onetimemessage(font,char,"missing")
-            end
+    end
+    if found then
+        for i=1,#found do
+            head = remove_node(head,found[i],true)
         end
     end
     return head
 end
 
 local relevant = {
-    "missing (will be deleted)",
-    "missing (will be flagged)",
-    "missing"
+    "missing (decomposed)",
+    "missing (replaced)",
+    "missing (deleted)",
+    "missing (checked)",
+    "missing",
 }
 
 local function getmissing(id)
@@ -380,17 +320,19 @@ do
     trackers.register("fonts.missing", function(v)
         if v then
             enableaction("processors","fonts.checkers.missing")
+            if v == true then
+                actions = { check = true }
+            else
+                actions = utilities.parsers.settings_to_set(v)
+                if not loaded and actions.replace then
+                    metapost.simple("simplefun",'loadfile("mp-miss.mpxl");')
+                    loaded = true
+                end
+            end
         else
             disableaction("processors","fonts.checkers.missing")
+            actions = false
         end
-     -- if v == "replace" then
-     --     otffeatures.defaults.missing = true
-     -- end
-        if not loaded and v == "replace" then
-            metapost.simple("simplefun",'loadfile("mp-miss.mpxl");')
-            loaded = true
-        end
-        action = v
     end)
 
     logs.registerfinalactions(function()
diff --git a/tex/context/base/mkxl/font-chk.mkxl b/tex/context/base/mkxl/font-chk.mkxl
index f64756983..34d676482 100644
--- a/tex/context/base/mkxl/font-chk.mkxl
+++ b/tex/context/base/mkxl/font-chk.mkxl
@@ -22,9 +22,10 @@
 % \definefontfeature[default][default][missing=yes]
 % \enabletrackers[fonts.missing=replace]
 
-\permanent\protected\def\checkcharactersinfont   {\enabletrackers[fonts.missing]}
+\permanent\protected\def\checkmissingcharacters  {\enabletrackers[fonts.missing]}
 \permanent\protected\def\removemissingcharacters {\enabletrackers[fonts.missing=remove]}
 \permanent\protected\def\replacemissingcharacters{\enabletrackers[fonts.missing=replace]}
+\permanent\protected\def\handlemissingcharacters {\enabletrackers[fonts.missing={decompose,replace}]}
 
 % \enableexperiments[fonts.compact]
 
diff --git a/tex/context/base/mkxl/font-sym.mklx b/tex/context/base/mkxl/font-sym.mklx
index c521582a2..806d2aff6 100644
--- a/tex/context/base/mkxl/font-sym.mklx
+++ b/tex/context/base/mkxl/font-sym.mklx
@@ -163,6 +163,8 @@
      \font_basics_define_symbolic_font
    \fi}
 
+\mutable\let\currentsymbolfont\empty
+
 \def\font_basics_define_symbolic_font
   {\definefont[currentsymbolfont][\askedsymbolfont]%
    \currentsymbolfont
diff --git a/tex/context/base/mkxl/java-ini.mkxl b/tex/context/base/mkxl/java-ini.mkxl
index 513dc20e3..f0e260eea 100644
--- a/tex/context/base/mkxl/java-ini.mkxl
+++ b/tex/context/base/mkxl/java-ini.mkxl
@@ -102,7 +102,7 @@
   {\begingroup
    \obeylualines
    \obeyluatokens
-   \let\u\m_java_escape_u
+   \enforced\let\u\m_java_escape_u
    \java_start_code}
 
 \def\java_start_code#1\stopJScode
@@ -114,7 +114,7 @@
   {\begingroup
    \obeylualines
    \obeyluatokens
-   \let\u\m_java_escape_u
+   \enforced\let\u\m_java_escape_u
    \java_start_preamble}
 
 \def\java_start_preamble#1\stopJSpreamble
diff --git a/tex/context/base/mkxl/lpdf-emb.lmt b/tex/context/base/mkxl/lpdf-emb.lmt
index 3412a5a78..4337e5931 100644
--- a/tex/context/base/mkxl/lpdf-emb.lmt
+++ b/tex/context/base/mkxl/lpdf-emb.lmt
@@ -1574,9 +1574,8 @@ do
                         local name   = f_glyph(nofglyphs)
                         local stream = nil
                         if fixdepth then
-                            local depth  = data.depth  or 0
-                            local height = data.height or 0
-                            if depth ~= 0 or height ~= 0 then
+                            local depth = data.depth  or 0
+                            if depth ~= 0 then
                                 local d     = data.dropin.descriptions[data.index]
                                 local b     = d.boundingbox
                                 local l     = b[1]
@@ -1584,13 +1583,13 @@ do
                                 local w     = r - l
                                 local scale = w / d.width
                                 local x     = l
-                                local y     = - b[4] - b[2] - d.depth
+                             -- local y     = - b[4] - b[2] - (d.depth or 0)
+                                local y     = - (d.depth or 0)
                                 local scale = w / (image.width * bpfactor)
                                 stream = f_image_c_xy(scale,scale,x,y,name)
-                            else
-                                stream = f_image_c(name)
                             end
-                        else
+                        end
+                        if not stream then
                             stream = f_image_c(name)
                         end
                         useddoc[glyph]           = image
diff --git a/tex/context/base/mkxl/math-rad.mklx b/tex/context/base/mkxl/math-rad.mklx
index 4196bd0f7..8906efdc8 100644
--- a/tex/context/base/mkxl/math-rad.mklx
+++ b/tex/context/base/mkxl/math-rad.mklx
@@ -92,23 +92,25 @@
    \c!mpoffset=.25\exheight]
 
 \appendtoks
-    \frozen\instance\setuevalue{\currentmathradical}{\math_radical_handle{\currentmathradical}}
+    \frozen\protected\instance\edefcsname\currentmathradical\endcsname{\math_radical_handle{\currentmathradical}}
 \to \everydefinemathradical
 
-\protected\def\math_radical_handle#tag%
+\mutable\let\currentmathradical      \empty
+\mutable\let\currentmathradicaldegree\empty
+
+\tolerant\protected\def\math_radical_handle#tag#*[#degree]#:#body%
   {\begingroup
    \edef\currentmathradical{#tag}%
-   \doifelsenextoptionalcs\math_radical_degree_yes\math_radical_degree_nop}
-
-\def\math_radical_alternative{\csname\??mathradicalalternative\mathradicalparameter\c!alternative\endcsname}
+   \edef\currentmathradicaldegree{#degree}%
+   \ifempty\currentmathradicaldegree
+     \let\currentmathradicaldegree\m_math_no_degree
+   \fi
+   \math_radical_alternative{#body}%
+   \endgroup}
 
 \def\m_math_no_degree{{}}
 
-\def\math_radical_degree_yes[#degree]{\edef\currentmathradicaldegree{#degree}\math_radical_indeed}
-\def\math_radical_degree_nop         {\let\currentmathradicaldegree\m_math_no_degree\math_radical_indeed}
-
-\def\math_radical_indeed#body%
-  {\math_radical_alternative{#body}\endgroup}
+\def\math_radical_alternative{\csname\??mathradicalalternative\mathradicalparameter\c!alternative\endcsname}
 
 \setvalue{\??mathradicalalternative\v!default}%  #body%
   {\rootradical{\currentmathradicaldegree}}   % {#body}}
diff --git a/tex/context/base/mkxl/mult-ini.lmt b/tex/context/base/mkxl/mult-ini.lmt
new file mode 100644
index 000000000..7c60d5b33
--- /dev/null
+++ b/tex/context/base/mkxl/mult-ini.lmt
@@ -0,0 +1,389 @@
+if not modules then modules = { } end modules ['mult-ini'] = {
+    version   = 1.001,
+    comment   = "companion to mult-ini.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local format, gmatch, match, find, sub = string.format, string.gmatch, string.match, string.find, string.sub
+local lpegmatch = lpeg.match
+local serialize, concat = table.serialize, table.concat
+local rawget, type, tonumber, next = rawget, type, tonumber, next
+
+local context             = context
+local commands            = commands
+local implement           = interfaces.implement
+
+local allocate            = utilities.storage.allocate
+local mark                = utilities.storage.mark
+local prtcatcodes         = catcodes.numbers.prtcatcodes
+local vrbcatcodes         = catcodes.numbers.vrbcatcodes
+local contextsprint       = context.sprint
+local setmetatableindex   = table.setmetatableindex
+local formatters          = string.formatters
+
+local report_interface    = logs.reporter("interface","initialization")
+
+interfaces                = interfaces                     or { }
+interfaces.constants      = mark(interfaces.constants      or { })
+interfaces.variables      = mark(interfaces.variables      or { })
+interfaces.elements       = mark(interfaces.elements       or { })
+interfaces.formats        = mark(interfaces.formats        or { })
+interfaces.translations   = mark(interfaces.translations   or { })
+interfaces.setupstrings   = mark(interfaces.setupstrings   or { })
+interfaces.corenamespaces = mark(interfaces.corenamespaces or { })
+interfaces.usednamespaces = mark(interfaces.usednamespaces or { })
+
+local registerstorage     = storage.register
+local sharedstorage       = storage.shared
+
+local constants           = interfaces.constants
+local variables           = interfaces.variables
+local elements            = interfaces.elements
+local formats             = interfaces.formats
+local translations        = interfaces.translations
+local setupstrings        = interfaces.setupstrings
+local corenamespaces      = interfaces.corenamespaces
+local usednamespaces      = interfaces.usednamespaces
+local reporters           = { } -- just an optimization
+
+local setmacro            = tokens.setters.macro
+
+registerstorage("interfaces/constants",      constants,      "interfaces.constants")
+registerstorage("interfaces/variables",      variables,      "interfaces.variables")
+registerstorage("interfaces/elements",       elements,       "interfaces.elements")
+registerstorage("interfaces/formats",        formats,        "interfaces.formats")
+registerstorage("interfaces/translations",   translations,   "interfaces.translations")
+registerstorage("interfaces/setupstrings",   setupstrings,   "interfaces.setupstrings")
+registerstorage("interfaces/corenamespaces", corenamespaces, "interfaces.corenamespaces")
+registerstorage("interfaces/usednamespaces", usednamespaces, "interfaces.usednamespaces")
+
+interfaces.interfaces = {
+    "cs", "de", "en", "fr", "it", "nl", "ro", "pe",
+}
+
+sharedstorage.currentinterface = sharedstorage.currentinterface or "en"
+sharedstorage.currentresponse  = sharedstorage.currentresponse  or "en"
+
+local currentinterface = sharedstorage.currentinterface
+local currentresponse  = sharedstorage.currentresponse
+
+interfaces.currentinterface = currentinterface
+interfaces.currentresponse  = currentresponse
+
+local complete      = allocate()
+interfaces.complete = complete
+
+local function resolve(t,k) -- one access needed to get loaded (not stored!)
+    report_interface("loading interface definitions from 'mult-def.lua'")
+    complete = dofile(resolvers.findfile("mult-def.lua"))
+    report_interface("loading interface messages from 'mult-mes.lua'")
+    complete.messages = dofile(resolvers.findfile("mult-mes.lua"))
+    interfaces.complete = complete
+    return rawget(complete,k)
+end
+
+setmetatableindex(complete, resolve)
+
+local function valueiskey(t,k) -- will be helper
+    t[k] = k
+    return k
+end
+
+setmetatableindex(variables,    valueiskey)
+setmetatableindex(constants,    valueiskey)
+setmetatableindex(elements,     valueiskey)
+setmetatableindex(formats,      valueiskey)
+setmetatableindex(translations, valueiskey)
+setmetatableindex(setupstrings, valueiskey)
+
+function interfaces.registernamespace(n,namespace)
+    corenamespaces[n] = namespace
+    usednamespaces[namespace] = n
+end
+
+function interfaces.getnamespace(n)
+    return usednamespaces[n] .. ">"
+end
+
+if documentdata then
+
+    local prefix, getmacro
+
+    function documentdata.variable(name)
+        if not prefix then
+            prefix = usednamespaces.variables .. ">document:"
+        end
+        if not getmacro then
+            getmacro = tokens.getters.macro
+        end
+        return getmacro(prefix..name)
+    end
+
+end
+
+local function resolve(t,k)
+    local v = logs.reporter(k)
+    t[k] = v
+    return v
+end
+
+setmetatableindex(reporters,resolve)
+
+for category, _ in next, translations do
+    -- We pre-create reporters for already defined messages
+    -- because otherwise listing is incomplete and we want
+    -- to use that for checking so delaying makes not much
+    -- sense there.
+    local r = reporters[category]
+end
+
+-- adding messages
+
+local function add(target,tag,values)
+    local t = target[tag]
+    if not f then
+        target[tag] = values
+    else
+        for k, v in next, values do
+            if f[k] then
+                -- error
+            else
+                f[k] = v
+            end
+        end
+    end
+end
+
+function interfaces.settranslation(tag,values)
+    add(translations,tag,values)
+end
+
+function interfaces.setformat(tag,values)
+    add(formats,tag,values)
+end
+
+local function getsetupstring(tag)
+    return setupstrings[tag] or tag
+end
+
+interfaces.getsetupstring = getsetupstring
+
+-- the old method:
+
+local replacer = lpeg.replacer { { "--", "%%a" } }
+
+local function fulltag(category,tag)
+    return formatters["%s:%s"](category,lpegmatch(replacer,tag))
+end
+
+function interfaces.setmessages(category,str)
+    for tag, message in gmatch(str,"(%S+) *: *(.-) *[\n\r]") do
+        if tag == "title" then
+            translations[tag] = translations[tag] or tag
+        else
+            formats[fulltag(category,tag)] = lpegmatch(replacer,message)
+        end
+    end
+end
+
+function interfaces.setmessage(category,tag,message)
+    formats[fulltag(category,tag)] = lpegmatch(replacer,message)
+end
+
+function interfaces.getmessage(category,tag,default)
+    return formats[fulltag(category,tag)] or default or "unknown message"
+end
+
+function interfaces.doifelsemessage(category,tag)
+    return rawget(formats,fulltag(category,tag))
+end
+
+local splitter = lpeg.splitat(",")
+
+function interfaces.showmessage(category,tag,arguments)
+    local r = reporters[category]
+    local f = formats[fulltag(category,tag)]
+    local t = type(arguments)
+    if t == "string" and #arguments > 0 then
+        r(f,lpegmatch(splitter,arguments))
+    elseif t == "table" then
+        r(f,unpack(arguments))
+    elseif arguments then
+        r(f,arguments)
+    else
+        r(f)
+    end
+end
+
+-- till here
+
+function interfaces.setvariable(variable,given)
+    variables[given] = variable
+end
+
+function interfaces.setconstant(constant,given)
+    constants[given] = constant
+end
+
+function interfaces.setelement(element,given)
+    elements[given] = element
+end
+
+-- the real thing:
+
+logs.setmessenger(context.verbatim.ctxreport)
+
+interfaces.cachedsetups = interfaces.cachedsetups or { }
+interfaces.hashedsetups = interfaces.hashedsetups or { }
+
+local cachedsetups = interfaces.cachedsetups
+local hashedsetups = interfaces.hashedsetups
+
+storage.register("interfaces/cachedsetups", cachedsetups, "interfaces.cachedsetups")
+storage.register("interfaces/hashedsetups", hashedsetups, "interfaces.hashedsetups")
+
+function interfaces.cachesetup(t)
+    local hash = serialize(t)
+    local done = hashedsetups[hash]
+    if done then
+        return cachedsetups[done]
+    else
+        done = #cachedsetups + 1
+        cachedsetups[done] = t
+        hashedsetups[hash] = done
+        return t
+    end
+end
+
+function interfaces.interfacedcommand(name)
+    local command = complete.commands[name]
+    return command and command[currentinterface] or name
+end
+
+-- interface
+
+function interfaces.writestatus(category,message)
+    reporters[category](message) -- could also be a setmetatablecall
+end
+
+function interfaces.message(str)
+    texio.write(str) -- overloaded
+end
+
+implement { name = "registernamespace",    actions = interfaces.registernamespace, arguments = { "integer", "string" } }
+implement { name = "setinterfaceconstant", actions = interfaces.setconstant,       arguments = "2 strings" }
+implement { name = "setinterfacevariable", actions = interfaces.setvariable,       arguments = "2 strings" }
+implement { name = "setinterfaceelement",  actions = interfaces.setelement,        arguments = "2 strings" }
+implement { name = "setinterfacemessage",  actions = interfaces.setmessage,        arguments = "3 strings" }
+implement { name = "setinterfacemessages", actions = interfaces.setmessages,       arguments = "2 strings" }
+
+implement {
+    name      = "showmessage",
+    public    = true,
+    protected = true,
+    arguments = "3 arguments" ,
+    actions   = interfaces.showmessage,
+}
+
+implement {
+    name      = "doifelsemessage",
+    public    = true,
+    protected = true,
+    arguments = "2 arguments",
+    actions   = { interfaces.doifelsemessage, commands.doifelse },
+}
+
+implement {
+    name      = "getmessage",
+    public    = true,
+    protected = true,
+    arguments = "3 arguments",
+    actions   = function(...)
+        setmacro("currentmessagetext", interfaces.getmessage(...))
+    end,
+}
+
+implement {
+    name      = "writestatus",
+    overload  = true,
+    public    = true,
+    protected = true,
+    arguments = "2 arguments",
+    actions   = interfaces.writestatus,
+}
+
+implement {
+    name      = "message",
+    overload  = true,
+    public    = true,
+    protected = true,
+    arguments = "string",
+    actions   = interfaces.message,
+}
+
+local function gss(s)
+    contextsprint(vrbcatcodes,getsetupstring(s))
+end
+
+implement { -- will be overloaded
+    name      = "getsetupstring",
+    public    = true,
+ -- protected = true,
+    arguments = "string",
+    actions   = gss,
+}
+
+implement {
+    name      = "rawsetupstring",
+    public    = true,
+    arguments = "string",
+    actions   = gss,
+}
+
+
+local function showassignerror(namespace,key,line)
+ -- if key and key ~= "" and key ~= "," then
+        local ns, instance = match(namespace,"^(%d+)[^%a]+(%a*)")
+        if ns then
+            namespace = corenamespaces[tonumber(ns)] or ns
+        end
+        -- injected in the stream for timing:
+        if instance and instance ~= "" then
+            context.writestatus("setup",formatters["error in line %a, namespace %a, instance %a, key %a"](line,namespace,instance,key))
+        else
+            context.writestatus("setup",formatters["error in line %a, namespace %a, key %a"](line,namespace,key))
+        end
+ -- end
+end
+
+implement {
+    name      = "showassignerror",
+    actions   = showassignerror,
+    arguments = { "string", "string", "integer" },
+}
+
+-- a simple helper
+
+local settings_to_hash = utilities.parsers.settings_to_hash
+
+local makesparse = function(t)
+    for k, v in next, t do
+        if not v or v == "" then
+            t[k] = nil
+        end
+    end
+    return t
+end
+
+function interfaces.checkedspecification(specification)
+    local kind = type(specification)
+    if kind == "table" then
+        return makesparse(specification)
+    elseif kind == "string" and specification ~= "" then
+        return makesparse(settings_to_hash(specification))
+    else
+        return { }
+    end
+end
diff --git a/tex/context/base/mkxl/mult-ini.mkxl b/tex/context/base/mkxl/mult-ini.mkxl
index f2dad6fac..17f63ef93 100644
--- a/tex/context/base/mkxl/mult-ini.mkxl
+++ b/tex/context/base/mkxl/mult-ini.mkxl
@@ -19,7 +19,7 @@
 
 \unprotect
 
-\registerctxluafile{mult-ini}{}
+\registerctxluafile{mult-ini}{autosuffix}
 \registerctxluafile{mult-fmt}{initexonly}
 
 %D \macros
@@ -368,28 +368,25 @@
 
 \aliased\let\stopmessages\relax
 
+\mutable\let\currentmessagetext\empty
+
 \permanent\protected\def\setinterfacemessage#1#2#3%
-  {\ifcsname\m!prefix!#1\endcsname\else\immutable\setgvalue{\m!prefix!#1}{#1}\fi
+  {\ifcsname\m!prefix!#1\endcsname\else\immutable\gdefcsname\m!prefix!#1\endcsname{#1}\fi
    \clf_setinterfacemessage{#1}{#2}{#3}}
 
-\pushoverloadmode
-
-\permanent\protected\def\setmessagetext   #1#2{\relax\edef\currentmessagetext{\clf_getmessage{#1}{#2}}}
-\permanent\protected\def\getmessage       #1#2{\relax\clf_getmessage{#1}{#2}}
-\permanent\protected\def\doifelsemessage  #1#2{\relax\clf_doifelsemessage{#1}{#2}}
-\permanent\protected\def\showmessage    #1#2#3{\relax\clf_showmessage{#1}{#2}{#3}}
-\permanent\protected\def\writestatus      #1#2{\relax\clf_writestatus{#1}{#2}}
-\permanent\protected\def\message              {\relax\clf_message}
-
-\popoverloadmode
+% \getmessage       % {tag} {index} -> \currentmessagetext
+% \doifelsemessage  % {tag} {index}
+% \showmessage      % {tag} {index} {detail}
+% \writestatus      % {tag} {string}
+% \message          % {string}
 
 \aliased\let\doifmessageelse\doifelsemessage
 
 \permanent\protected\def\inlinemessage #1{\dontleavehmode{\tttf#1}}
 \permanent\protected\def\displaymessage#1{\blank\inlinemessage{#1}\blank}
 
-\permanent\let\getsetupstring\clf_getsetupstring
-\permanent\let\rawsetupstring\clf_rawsetupstring
+% \getsetupstring % {tag} defined at the lua end
+% \rawsetupstring % {tag} defined at the lua end
 
 %D For old times sake:
 
@@ -753,6 +750,8 @@
 %D So much for the basic multi||lingual interface commands. The macro's can be
 %D enhanced with more testing facilities, but for the moment they suffice.
 
+% use \Uchar
+
 \ifdefined\zwnj \else \immutable\edef\zwnj{\directlua{utf.char(\number"200C)}} \fi % needed for cont-pe % maybe to char-utf.mkiv
 \ifdefined\zwj  \else \immutable\edef\zwj {\directlua{utf.char(\number"200D)}} \fi % needed for cont-pe % maybe to char-utf.mkiv
 
diff --git a/tex/context/base/mkxl/pack-rul.mkxl b/tex/context/base/mkxl/pack-rul.mkxl
index e793b1e53..47f1b0a19 100644
--- a/tex/context/base/mkxl/pack-rul.mkxl
+++ b/tex/context/base/mkxl/pack-rul.mkxl
@@ -1357,22 +1357,25 @@
 %D never occur. Nevertheless we implement the whole scheme, if not for future
 %D extensions.
 
-%D \macros
-%D   {doassigncheckedframeoffset}
-%D
-%D Offset helper (see menus):
-
-\def\doassigncheckedframeoffset#1#2% could be a fast \csname .. \endcsname
-  {\edef\checkedframeoffset{#2}%
-   #1%
-     \ifempty\checkedframeoffset      \zeropoint\orelse
-     \ifx\checkedframeoffset\v!overlay\zeropoint\orelse
-     \ifx\checkedframeoffset\v!none   \zeropoint\orelse
-     \ifx\checkedframeoffset\v!frame  \zeropoint\orelse
-     \ifx\checkedframeoffset\v!default\zeropoint\else
-       #2%
-     \fi
-   \relax}
+% %D \macros
+% %D   {doassigncheckedframeoffset}
+% %D
+% %D Offset helper (see menus):
+%
+% \def\doassigncheckedframeoffset#1#2% could be a fast \csname .. \endcsname
+%   {\edef\checkedframeoffset{#2}%
+%    #1%
+%      \ifempty\checkedframeoffset      \zeropoint\orelse
+%      \ifx\checkedframeoffset\v!overlay\zeropoint\orelse
+%      \ifx\checkedframeoffset\v!none   \zeropoint\orelse
+%      \ifx\checkedframeoffset\v!frame  \zeropoint\orelse
+%      \ifx\checkedframeoffset\v!default\zeropoint\else
+%        #2%
+%      \fi
+%    \relax}
+%
+% \def\doassigncheckedframeoffset#1#2% could be a fast \csname .. \endcsname
+%   {#1\ifchkdim#2\or#2\else\zeropoint\fi}%
 
 %D \macros
 %D   {ifreshapeframebox}
diff --git a/tex/context/base/mkxl/page-txt.mklx b/tex/context/base/mkxl/page-txt.mklx
index 981a15089..10b5d1a74 100644
--- a/tex/context/base/mkxl/page-txt.mklx
+++ b/tex/context/base/mkxl/page-txt.mklx
@@ -422,7 +422,7 @@
 %D The placement of a whole line is handled by the next two macros. These are hooked
 %D into the general purpose token list registers mentioned before.
 
-\let\currentlayouttextline\relax
+\mutable\let\currentlayouttextline\relax
 
 \def\page_layouts_place_text_line_indeed#vertical#height%
   {\let\currentlayouttextline#vertical%
diff --git a/tex/context/base/mkxl/scrn-but.mklx b/tex/context/base/mkxl/scrn-but.mklx
index 4fd7bfffc..d9d7d22ed 100644
--- a/tex/context/base/mkxl/scrn-but.mklx
+++ b/tex/context/base/mkxl/scrn-but.mklx
@@ -434,10 +434,10 @@
 \newconditional\c_scrn_menu_zerodimensions
 
 \def\scrn_menu_set_used
-  {\doassigncheckedframeoffset\d_scrn_menu_offset_left  {\interactionmenuparameter\c!leftoffset  }%
-   \doassigncheckedframeoffset\d_scrn_menu_offset_right {\interactionmenuparameter\c!rightoffset }%
-   \doassigncheckedframeoffset\d_scrn_menu_offset_top   {\interactionmenuparameter\c!topoffset   }%
-   \doassigncheckedframeoffset\d_scrn_menu_offset_bottom{\interactionmenuparameter\c!bottomoffset}%
+  {\d_scrn_menu_offset_left  \ifchkdim\interactionmenuparameter\c!leftoffset  \or\lastchkdim\else\zeropoint\fi
+   \d_scrn_menu_offset_right \ifchkdim\interactionmenuparameter\c!rightoffset \or\lastchkdim\else\zeropoint\fi
+   \d_scrn_menu_offset_top   \ifchkdim\interactionmenuparameter\c!topoffset   \or\lastchkdim\else\zeropoint\fi
+   \d_scrn_menu_offset_bottom\ifchkdim\interactionmenuparameter\c!bottomoffset\or\lastchkdim\else\zeropoint\fi
    \d_scrn_menu_asked_width  \interactionmenuparameter\c!maxwidth
    \d_scrn_menu_asked_height \interactionmenuparameter\c!maxheight
    \d_scrn_menu_used_width\dimexpr
diff --git a/tex/context/base/mkxl/scrn-wid.mklx b/tex/context/base/mkxl/scrn-wid.mklx
index 225bdc161..5d1d67a99 100644
--- a/tex/context/base/mkxl/scrn-wid.mklx
+++ b/tex/context/base/mkxl/scrn-wid.mklx
@@ -599,7 +599,9 @@
 % see usage. Probaly by that time this feature is dropped (as are other media
 % rel;ated ones).
 
-\let\currentrendering\empty
+\mutable\let\currentrendering      \empty
+\mutable\let\currentrenderingtype  \empty
+\mutable\let\currentrenderingwindow\empty
 
 \definereference[StartCurrentRendering] [\v!StartRendering {\currentrendering}]
 \definereference[StopCurrentRendering]  [\v!StopRendering  {\currentrendering}]
diff --git a/tex/context/base/mkxl/spac-ali.mkxl b/tex/context/base/mkxl/spac-ali.mkxl
index 17886dfd3..67265c1a4 100644
--- a/tex/context/base/mkxl/spac-ali.mkxl
+++ b/tex/context/base/mkxl/spac-ali.mkxl
@@ -21,6 +21,23 @@
 
 \registerctxluafile{spac-ali}{autosuffix,optimize}
 
+% Used once so ... replace it or use if more frequently ...
+
+\installcorenamespace {alignswitch}
+
+% maybe \setconstantvalue or so
+
+\expandafter\integerdef\csname\??alignswitch\v!left  \endcsname\zerocount
+\expandafter\integerdef\csname\??alignswitch\v!middle\endcsname\plusone
+\expandafter\integerdef\csname\??alignswitch\v!right \endcsname\plustwo
+
+\mutable\integerdef\alignmentswitch\zerocount
+
+\permanent\protected\def\setalignmentswitch#1%
+  {\integerdef\alignmentswitch\csname\??alignswitch\ifcsname\??alignswitch#1\endcsname#1\else\v!left\fi\endcsname}
+
+% till here
+
 \definesystemattribute[realign]   [public] % might be combined with the next one
 \definesystemattribute[alignstate][public] % will make a single attributes for several states
 
diff --git a/tex/context/base/mkxl/spac-pag.mkxl b/tex/context/base/mkxl/spac-pag.mkxl
index dbee431af..d9f7c67a1 100644
--- a/tex/context/base/mkxl/spac-pag.mkxl
+++ b/tex/context/base/mkxl/spac-pag.mkxl
@@ -15,18 +15,6 @@
 
 \unprotect
 
-%D The code here has evolved over time and might not be the best
-%D around. Maybe much will be gone a some point.
-
-\installcorenamespace {alignswitch}
-
-\letvalue{\??alignswitch\v!left  }\zerocount
-\letvalue{\??alignswitch\v!middle}\plusone
-\letvalue{\??alignswitch\v!right }\plustwo
-
-\permanent\protected\def\setalignmentswitch#1%
-  {\chardef\alignmentswitch\csname\??alignswitch\ifcsname\??alignswitch#1\endcsname#1\else\v!left\fi\endcsname}
-
 \newif      \ifpagestatemismatch
 \newcount   \realpagestateno
 \newconstant\frozenpagestate
diff --git a/tex/context/base/mkxl/spac-ver.mkxl b/tex/context/base/mkxl/spac-ver.mkxl
index 5c150f225..6764213e3 100644
--- a/tex/context/base/mkxl/spac-ver.mkxl
+++ b/tex/context/base/mkxl/spac-ver.mkxl
@@ -1708,6 +1708,9 @@
 \permanent\protected\def\setupgridsnapping[#1]% less overhead than setuplayout (needs testing)
   {\setlayoutparameter\c!grid{#1}\synchronizegridsnapping}
 
+\mutable\let\checkedgridmethod\empty   % these can become private
+\mutable\let\checkedgridscope \v!local % these can become private
+
 \permanent\protected\def\checkgridmethod#1%
   {\edef\p_grid{#1}%
    \ifempty\p_grid
diff --git a/tex/context/base/mkxl/strc-sec.mkxl b/tex/context/base/mkxl/strc-sec.mkxl
index 863c454a9..50a81610e 100644
--- a/tex/context/base/mkxl/strc-sec.mkxl
+++ b/tex/context/base/mkxl/strc-sec.mkxl
@@ -520,7 +520,7 @@
    \pop_macro_currentheadparent
    \pop_macro_currenthead}
 
-\let\currentnamedsection\empty
+\mutable\let\currentnamedsection\empty
 
 \installmacrostack\currentnamedsection
 
@@ -572,10 +572,12 @@
 
 \newtoks\everydefinesection
 
+\mutable\let\currentsection\empty % historic alias
+
 \permanent\protected\def\definesection[#1]%
   {\ifcsname\??headlevel#1\endcsname \else
-     \edef\currentsection{#1}% not used, will go
      \edef\currenthead{#1}%
+     \let\currentsection\currenthead % just an alias
      \global\advance\maxstructuredepth\plusone
      \setevalue{\??headlevel#1}{\the\maxstructuredepth}%
      \setstructurelevel{#1}{\sectionlevel{#1}}%
@@ -613,7 +615,7 @@
     % be part of the parent chain lookup mechanism; it's also
     % mkii compatible. Somewhat weird that it's part of the
     % top level structure but it will be flattened anyway.
-    \let\currenthead\currentsection %
+  % \let\currenthead\currentsection % hm
     \setheadparameter\c!textstyle  {\directheadparameter\c!style}%
     \setheadparameter\c!textcolor  {\directheadparameter\c!color}%
     \setheadparameter\c!numberstyle{\directheadparameter\c!style}%
diff --git a/tex/context/interface/mkii/keys-ro.xml b/tex/context/interface/mkii/keys-ro.xml
index ef5c385fc..bc9e87ddf 100644
--- a/tex/context/interface/mkii/keys-ro.xml
+++ b/tex/context/interface/mkii/keys-ro.xml
@@ -780,6 +780,8 @@
 		<cd:constant name='deepnumbercommand' value='deepnumbercommand'/>
 		<cd:constant name='deeptextcommand' value='deeptextcommand'/>
 		<cd:constant name='default' value='implicit'/>
+		<cd:constant name='defaultheight' value='defaultheight'/>
+		<cd:constant name='defaultwidth' value='defaultwidth'/>
 		<cd:constant name='define' value='define'/>
 		<cd:constant name='delay' value='intarziere'/>
 		<cd:constant name='depth' value='inaltime'/>
@@ -1124,6 +1126,7 @@
 		<cd:constant name='print' value='print'/>
 		<cd:constant name='printable' value='tiparibil'/>
 		<cd:constant name='process' value='process'/>
+		<cd:constant name='processors' value='processors'/>
 		<cd:constant name='profile' value='profile'/>
 		<cd:constant name='properties' value='properties'/>
 		<cd:constant name='pubsep' value='pubsep'/>
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index 72ae3ab9c..c97e8fad5 100644
--- a/tex/generic/context/luatex/luatex-fonts-merged.lua
+++ b/tex/generic/context/luatex/luatex-fonts-merged.lua
@@ -1,6 +1,6 @@
 -- merged file : c:/data/develop/context/sources/luatex-fonts-merged.lua
 -- parent file : c:/data/develop/context/sources/luatex-fonts.lua
--- merge date  : 2021-02-05 17:41
+-- merge date  : 2021-02-08 16:58
 
 do -- begin closure to overcome local limits and interference