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-rw-r--r--luaotfload.dtx15
1 files changed, 15 insertions, 0 deletions
diff --git a/luaotfload.dtx b/luaotfload.dtx
index b08091a..ab8949c 100644
--- a/luaotfload.dtx
+++ b/luaotfload.dtx
@@ -323,6 +323,21 @@ and the derived files
% |\font\test=Latin Modern Roman:protrusion=default|
% \end{description}
%
+% \subparagraph{Non-standard font features}
+% \textsf{luaotfload} defines some additional font feature not defined in
+% OpenType, currently three features are defined:
+%
+% \begin{itemize*}
+% \item |anum|: replaces European numbers with eastern Arabic numbers or
+% Persian numbers, depending on the value of |language|.
+% \item |tlig|: applies legacy \tex ligatures (|``''-- -- !` ?` <<>>|).
+% \item |trep|: applies legacy \tex replacements (|`'"|).
+% \end{itemize*}
+%
+% (For \xetex users: these last two are the equivalent of writing
+% |mapping=text-tex| using \xetex's input remapping feature.)
+%
+%
% \section{Font names database}
% \label{sec:fontdb}
%