Add a comment showing how one of the macros should be used.
diff --git a/Doc/texinputs/python.sty b/Doc/texinputs/python.sty
index 5eb86c7..0b2c637 100644
--- a/Doc/texinputs/python.sty
+++ b/Doc/texinputs/python.sty
@@ -804,6 +804,7 @@
\newcommand{\NULL}{\constant{NULL}}
\newcommand{\infinity}{\ensuremath{\infty}}
\newcommand{\plusminus}{\ensuremath{\pm}}
+% \menuselection{Start \sub Programs \sub Python}
\newcommand{\menuselection}[1]{{\def\sub{ \ensuremath{>} }#1}}
% Also for consistency: spell Python "Python", not "python"!