closing the section headings window on the left of the xpdf screen
I'm embarrassed to ask this question; should be able to find the answer on the web but don't know the terminology. When I open a pdf file (e.g., beamer file) using xpdf, there's an annoying window on the left displaying section headings. Presumably it's possible to close it, ideally toggle it closed and open with a key binding, but I can't find out how to do this. Can somebody please advise?