If your document does not strictly require highly specialized typefaces, stick to universally supported OpenType or TrueType fonts that handle CJK characters smoothly across Windows, Mac, and Linux platforms.
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When a software program converts a document into a PDF, it indexes the fonts used. If a font is named "F1" internally and utilizes a Character Identifier mapping table, it displays as within the document's properties. Why Do Cid Font F1 Errors Happen?
For those interested in learning more about the Cid Font F1 Normal, here are some additional resources:
: The PDF might show dots, boxes, or garbled characters because your system cannot find the original font. Extraction Errors