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diff --git a/tex/context/base/mkiv/typo-plc.mkiv b/tex/context/base/mkiv/typo-plc.mkiv
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+%D \module
+%D   [       file=typo-plc,
+%D        version=2020.07.01,
+%D          title=\CONTEXT\ Typesetting Macros,
+%D       subtitle=Placeholders,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Typesetting Macros / Placeholders}
+
+\unprotect
+
+\installcorenamespace {placeholder}
+
+\installcommandhandler \??placeholder {placeholder} \??placeholder
+
+\unexpanded\def\placeholder[#1]%
+  {\begingroup
+   \edef\currentplaceholder{#1}%
+   \placeholderparameter\c!before
+   \useplaceholderstyleandcolor\c!style\c!color
+   \placeholderparameter\c!text
+   \placeholderparameter\c!after
+   \endgroup}
+
+\defineplaceholder
+  [todo]
+ %[\c!text={Still to be written!},
+  [\c!text=todo, % labeltext ?
+   \c!style=\v!bold,
+   \c!before=\blank,
+   \c!after=\blank]
+
+\protect \endinput