Software like Adobe Illustrator or Acrobat may assign names like CIDFont+F1 as internal references to these subsets. The "Missing Font" Error:
The original document might use Arial , Times New Roman , or SimSun , but the PDF code renames them to or F2 to keep the file structure clean. Cid Font F1 F2 F3 F4 F5 Free Download
When software exports a document to PDF, it sometimes uses to handle complex character sets or large font data. If the specific font used in the original document (like Arial or Times New Roman) isn't fully embedded or is restricted by a license, the PDF viewer or editor (like Adobe Illustrator or Affinity Designer) may assign it a generic name like CIDFont+F1 . Software like Adobe Illustrator or Acrobat may assign