| Label | Likely use | Notes | |-------|-------------|-------| | F1 | Standard serif (Mincho style) | Good for body text in CJK | | F2 | Standard sans-serif (Gothic) | Clear for headings | | F3 | Bold variant | Often missing in older printers | | F4 | Italic/slant | May be synthetic | | F5 | Light/demi | Rare | | F6 | Monospace or symbol | Not always present |
: Open the PDF in a basic viewer like macOS Preview and use "Export as PDF" to "flatten" and re-embed the fonts. cidfont f1 f2 f3 f4 f5 f6 full
Think of these identifiers like the concept of a variable in algebra: | Label | Likely use | Notes |
PDFs from complex DTP (Desktop Publishing) files often embed up to 6 unique CIDFonts before switching to a different naming scheme (e.g., CIDFont+F7 becomes CIDFont+AA ). The F1..F6 range is the most common due to legacy Adobe Acrobat 5–7 behavior. Arbitrary labels assigned by the PDF generator
Arbitrary labels assigned by the PDF generator. For example, in some documents, CIDFont+F1 may actually be Arial Bold and CIDFont+F2 might be Arial Regular . Common Issues and Solutions