1 files changed, 3 insertions, 0 deletions
diff --git a/doc/context/sources/general/manuals/luametatex/luametatex-math.tex b/doc/context/sources/general/manuals/luametatex/luametatex-math.tex
index 7d5fa0808..1227e7573 100644
--- a/doc/context/sources/general/manuals/luametatex/luametatex-math.tex
+++ b/doc/context/sources/general/manuals/luametatex/luametatex-math.tex
@@ -1465,6 +1465,9 @@ $       \displaystyle \number\mathstyle        \crampedscriptscriptstyle \number
 
 Like: \inlinebuffer . Values outside the valid range are ignored.
 
+There is an extra option \type {norule} that can be used to suppress the rule while
+keeping the spacing compatible.
+
 \subsection {Delimiters: \type{\Uleft}, \lpr {Umiddle} and \lpr {Uright}}
 
 \topicindex {math+delimiters}