Cidfont F1 F2 F3 F4 F5 F6 Jun 2026

Below is a that defines and uses CIDFonts f1 – f6 (simulating different encodings or CMap usage) and then draws text with each.

Embed the required CIDFont or map F1 to a valid system font using fontconfig or a substitution table.

Instead, the software uses a process called . It only embeds the specific characters used in that exact document. If your document only uses the letters A, B, and C in Arial, the PDF will only contain the visual data for those three characters. cidfont f1 f2 f3 f4 f5 f6

The plus sign () indicates that only a subset of the font is included in the file. For example, if a document only uses five letters from a specific font, the PDF maker embeds only those five characters to save file size, creating a subset named CIDFont+F1 . Why Do These Fonts Cause PDF Errors?

When software (like Adobe InDesign or a PDF printer) exports a PDF, it often subsets the original fonts to reduce file size. If the original font cannot be fully embedded or if the software assigns randomized names for unique identification, it creates labels like CIDFont+F1 CIDFont+F2 Google Groups Sequential Naming Below is a that defines and uses CIDFonts

If you see names like , F2 , F3 , F4 , F5 , or F6 in your PDF document properties or receive error messages about them, you are likely dealing with mangled font metadata . These are not "real" font names but rather placeholder labels generated by PDF export software when it fails to correctly embed or name the original fonts. What is a CIDFont?

Then process the PDF:

When search engines or PDF text-extractors try to read a document without a proper encoding map, they "hallucinate" the internal labels instead of the actual words. The Symbolism of "f1 f2"