The labels "F1" through "F4" are essentially placeholders or internal aliases generated by the PDF creation engine. CID+ Fonts - Adobe Community
But is the human being standing naked in the room.
that is showing these missing font errors, or are you looking for a specific font family that uses this naming convention? Impossible fonts to be found / Fontes impossíveis de achar
: If you are editing the file, you can often manually replace these missing fonts with standard ones like Myriad Pro to restore the look of the text. Outline the Text : In Adobe Illustrator, try
