\documentclass[fleqn,leqno]{article}
\usepackage{hypertlabook}
\makeindex
\file{save-module}
\begin{popup}
 \tindex{1}{saving a module in Toolbox}%
 \ctindex{1}{Toolbox!saving a module in}{toolbox-sav-spec}%
 \vspace{-2\baselineskip}%
\subsection*{Saving a module in the Toolbox} 
To save the current module, either use the \textsf{Save} command
on the \textsf{File} menu, or else type \textsf{control+s}.
\end{popup}
\makepopup