If a PDF was generated badly by an automated web system or billing software, you can often rebuild the font mapping by printing the document to a flat PDF container. Open the PDF file in Google Chrome or Microsoft Edge.
cpdf -replace-fonts "CIDFont+F2" "NotoSansCJKjp-Bold" in.pdf -o out.pdf
If you are a software developer generating PDFs programmatically, seeing "CIDFont+F1" in your output indicates a flaw in your implementation. Your PDF library is failing to correctly map or embed the fonts you specified. cidfont f1 f2 f3 f4 f5 f6 full
CIDFonts natively support vertical writing (V) variants. For F1 (Japanese), a CMap ending in -V (e.g., 90pv-RKSJ-V ) rotates and reorders glyphs for vertical text layout. F2, F3, and F4 also have vertical variants, though less common.
A persistent myth, seen in some older forum posts, suggests that the number in "CIDFont+F1" indicates font weight (e.g., F1 = Bold, F2 = Regular). This is an oversimplification and generally . As one Adobe community expert correctly clarifies, "There are no specific fonts assigned to those. For example, I have a document with 'CIDFont+F1' as the font being used in a PDF, and the font in question was Tahoma, not Arial. 'CIDFont+F1' is not specific to any particular font.". If a PDF was generated badly by an
When you see a sequence like , it usually refers to a PDF that uses six distinct subset-embedded fonts, often in a complex, multi-language, or styled document. 1. What is a CIDFont?
While highly efficient, CID-keyed fonts were often used as embedded resources within PDFs for professional publishing. Today, they are considered a legacy format and have largely been superseded by OpenType, especially for general use. Your PDF library is failing to correctly map
The "full" part of your goal is achievable, but it requires moving from a to a fully embedded PDF using tools like Ghostscript or Adobe Acrobat's print-to-PDF engine with custom settings. Once you have that, CIDFont+F1 through CIDFont+F6 become truly portable, editable, and reliable across any RIP or PDF editor.
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