I think, help about fonts embedding (File => Properties => Fonts) needs some more informations: https://help.libreoffice.org/7.0/en-US/text/shared/01/prop_font_embed.html?&DbPAR=WRITER&System=WIN Help starts with "Mark this box ...", but there are several boxes and so I think it is outdated. Especially the meaning of the second option "Only embed fonts, that are used in documents" is not clear to me.