Global PDF Bookmarks
Currently a User can only view Bookmarks for a PDF if they open that PDF explicitly.
It would be good if a User can view Bookmarks across all PDFs even if they are not open. Clicking on a Bookmark would then open the corresponding PDF. This feature is supported in KDE/Okular https://docs.kde.org/trunk5/en/kdegraphics/okular/bookmark-management.html