If you have a Mac keyboard, instead of the Affinity Glyph navigator, you could select a glyph in the text and press the Globe/fn key (🌐). This opens Apple's characters viewer and presents you the selected glyph.Ā  Ā  If you want to know what are the fonts embedded in your PDF, you can open it with Acrobat Reader and press cmd/ctrl-D.Ā  Though this will not tell you what are the glyphs concerned…Ā