If you need to convert between font formats, several online tools support CID conversion:

I can provide step-by-step navigation instructions for your exact software configuration. Share public link

F1, F2, and F3 are specific types of CID fonts. These fonts are part of the Adobe CID font family, which is widely used in the publishing industry. They are known for their high-quality glyphs and are often used for typesetting Asian languages.

Software uses labels like F1 , F2 , and F3 to refer to specific font styles used in a document (e.g., F1 might be Arial Bold and F2 might be Arial Regular).

Here are genuine, free-to-use alternatives developed by major companies: 1. Adobe Source Han Sans / Source Han Serif

CIDFont+F1, F2, and F3 are not actual font names you can download; they are internal generic labels

A stable, free version of this pack is often shared by the user community. You can download it from the following link:

Because CIDFont+F1, F2, or F3 is , you cannot download it. Installing a file named CIDFont+F1 from an untrusted site will likely result in a corrupt or blank font file that does not solve your problem.