the file rather than opening it directly, then use the "Transparency Flattener" to convert the text to shapes (outlines), which removes the need for the original font file. Are you trying to edit a PDF
: Sometimes opening the file in a browser or a different PDF editor and using the "Print to PDF" function can re-encode the fonts properly. cid font f1 f2 f3 f4
When a PDF is created from software like Adobe InDesign, Illustrator, or Microsoft Word (with Asian language support), the text is often embedded or referenced as a CID font. This ensures: the file rather than opening it directly, then