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-rw-r--r--doc/refman/RefMan-ext.tex1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/refman/RefMan-ext.tex b/doc/refman/RefMan-ext.tex
index d21c91201..b77118e1f 100644
--- a/doc/refman/RefMan-ext.tex
+++ b/doc/refman/RefMan-ext.tex
@@ -253,6 +253,7 @@ Reset Initial.
\Rem An experimental syntax for projections based on a dot notation is
available. The command to activate it is
+\optindex{Printing Projections}
\begin{quote}
{\tt Set Printing Projections.}
\end{quote}