sudo apt install fonts-noto-cjk ghostscript fonts-liberation fonts-dejavu-core sudo fc-cache -fv
The answer is not as simple as downloading a file from a free font website. This article will explain what these fonts are, why you need them, and — most importantly — how to obtain or replace them (for free) without breaking your workflow or your budget. cidfont f1 f2 f3 f4 gratis
Restart your reader; the "F1" text should now render correctly. 2. Use a "Print to PDF" Workaround When a PDF is created, the software sometimes
is not a real font name. It is a tag created by Adobe Acrobat Distiller or a PDF printer. When a PDF is created, the software sometimes substitutes a placeholder name (F1, F2, etc.) for the original font to save space or because the original font is not embedded. When a PDF is created
If you are looking for actual high-quality, free-to-use fonts (gratis) to replace these, visit reputable libraries like: Google Fonts (Open source and web-ready) (Free professional-grade fonts) (Large collection of user-submitted free fonts) Are you trying to edit an existing PDF that has these errors, or are you designing something new and saw these names mentioned? CID+ Fonts - Adobe Community