: Because your computer doesn't know what "F1" is supposed to look like, it may display the text as dots, boxes, or garbled symbols. How to "Fix" Missing CID Fonts
These names are generic labels generated when a PDF is exported without fully embedding the original font names. They act as placeholders for the actual fonts used in the document, which are often common system fonts: Often maps to Arial Bold . CIDFont+F2: Often maps to Arial Regular . cid font f1 f2 f3 f4 free link download