CIDFont+F1, F2, F3, and F4

are generic names assigned to fonts in a PDF when the original font names are missing or the fonts were not correctly embedded during the file's creation. These labels do not refer to specific downloadable fonts but are placeholders generated by the software (like Adobe Acrobat or third-party PDF creators). Understanding the "F1–F4" Labels

: They typically appear as "TrueType (CID)" or "Type 1 (CID)" with Identity-H encoding in Acrobat font properties. Common Mappings for F1–F4

CID font F1 F2 F3 F4

These seemingly cryptic labels are actually the backbone of how complex scripts (like Chinese, Japanese, and Korean – CJK) are processed and printed. This article will demystify the naming convention, explain how it works, and show you why it matters for your workflow.

large character sets

Unlike traditional fonts that use a simple 1-byte encoding (max 256 characters), CID fonts are designed for (like Chinese, Japanese, Korean - CJK). They use a two-part system:

Conclusion: Mastering the F1-F4 Code

Preflight Fixes:

For advanced users, use the Preflight tool in Acrobat Pro (under Print Production). Search for "font" and look for the option to "Embed fonts even if text is invisible" or "Convert true type fonts to CID fonts" to force a correction.

Part 7: Best Practices for Handling CID Fonts (F1-F4) in Your Workflow

What CID fonts do