Dear Maintainer,
xpdf forgets the Outline pane ("bookmarks") settings when returning from
fullscreen mode. That includes visibility and width.
Steps to reproduce:
1) Open a PDF file containing bookmarks so the outline pane on the left side is shown
2) Close the outline pane or change its width
3) Go to fullscreen and return to window mode (Alt-f, twice)
Result: the outline panel will be reopened (if closed) or its width will return
to the default one (if the width was changed).