Cidfontf1 F2 F3 F4 F5 F6 Updated [top] May 2026

CID Fonts and the f1–f6 Identifiers

1. What Are CID Fonts?

• CID-keyed fonts allow encoding of thousands of characters (e.g., CJK fonts) by using a CID (a number mapping to a glyph) plus a CMap (Character Map) that translates character codes to CIDs.
• Unlike simple fonts (Type 1, TrueType), CID fonts separate character collection, encoding, and glyph descriptions.

5. Common Problems & Solutions

| Problem | Likely cause | Updated fix | |---------|--------------|--------------| | Text copies as gibberish | Missing or wrong CMap | Rebuild ToUnicode using Adobe Acrobat’s “Export > More > PostScript” then re-distill | | F1 changes to F6 after editing | Font substitution in PDF editor | Embed fonts fully (not just subsets) before editing | | Cannot find F3 in fonts list | F3 is a subset but not referenced | Run pdffonts -subst (Linux) or Acrobat Preflight: “List fonts” | | Legacy PDF shows F1–F6 only | Original PostScript conversion | Use cpdf to rename tags: cpdf -rename-fonts in.pdf -o out.pdf |

Title

A Comprehensive Review and Update on CIDFonts: cidfontf1–f6 cidfontf1 f2 f3 f4 f5 f6 updated

Transparency Flattener (for Illustrator Users): Instead of opening the PDF directly, create a new document and "Place" the PDF inside it. Then, use the Transparency Flattener to convert the text to outlines, bypassing the need for the font entirely. CID Fonts and the f1 – f6 Identifiers 1

5.2 Good Practice (Updated)

// iText 7 (2025)
PdfFont font = PdfFontFactory.createFont("NotoSansCJK-Regular.ttf", 
                                          PdfEncodings.IDENTITY_H, 
                                          true);