Meta for issues related to the format options dialog that appears after selecting a filename in the file export dialog. Images https://opengrok.libreoffice.org/xref/core/svtools/uiconfig/ui/graphicexport.ui PDFs https://opengrok.libreoffice.org/xref/core/filter/uiconfig/ui/pdfoptionsdialog.ui
File > Export As > Export as PDF... > Security > Set Passwords.. has options that say Set open password, and Set permission password. These don't seem meaningful to me. I would like to suggest that the context help explain something like this: Set open password: Requires user of the generated PDF to enter a password before it can be viewed without encryption. Set permission password: Requires user of the LibreOffice Writer file to enter a password before the file can be read or edited.
The current online Password help is here [1], and reads: The open password must be entered to open the file. The permission password must be entered to edit the document. It seems sufficient, and would be the basis for tooltip when reimplemented. But, as this is a META issue--new Documentation/Help issue should be opened,and linked against the PDF Export options META bug 108694 =-ref-= [1] https://help.libreoffice.org/6.3/en-US/text/shared/01/password_dlg.html?System=WIN&DbPAR=WRITER&HID=sfx/ui/password/pass1ed#bm_id3152878