add a relevant "see also" link
diff --git a/Doc/mac/libmacui.tex b/Doc/mac/libmacui.tex
index 6d827bc..c58edd0 100644
--- a/Doc/mac/libmacui.tex
+++ b/Doc/mac/libmacui.tex
@@ -191,6 +191,15 @@
\function{AskFileForOpen()} for a description of the arguments.
\end{funcdesc}
+
+\begin{seealso}
+ \seetitle
+ [http://developer.apple.com/documentation/Carbon/Reference/Navigation_Services_Ref/]
+ {Navigation Services Reference}{Programmer's reference documentation
+ for the Navigation Services, a part of the Carbon framework.}
+\end{seealso}
+
+
\subsection{ProgressBar Objects \label{progressbar-objects}}
\class{ProgressBar} objects provide support for modeless progress-bar