Till now, when I received PDF files and needed to modify them in AD or APub, but I don't have all the fonts, there's nothing I could do. In AD, opening the file with the option "text as curves" do nothing, and APub replace missing fonts with other ones. Aside: It seems more interesting to open PDF in APub since visible bleed is possible and elements out of the page area are displayed too. In the futur, AD will be able to convert text to curves when we have missing font.