stands for Character ID. CID fonts are a type of font used in PostScript and PDF files, designed to handle large character sets efficiently, such as those required for Asian languages (Chinese, Japanese, Korean, etc.). Unlike traditional Type 1 fonts or TrueType fonts, which are limited to 256 characters, CID fonts can define thousands of characters.
is part of the CID-keyed font, a font format that allows for an arbitrary number of glyphs. CID-keyed fonts are not limited by the 256 character limit and are thus very useful for languages with large character sets. cidfont+f1 font
Think of it as a massive, organized warehouse of character shapes. To actually use that warehouse, you need a map. That’s where the (or the font reference in a PDF page resource) comes in. It acts as the bridge, encoding the specific instructions on how to map those raw CIDs to readable text. stands for Character ID
CIDFont+F1 is the plumbing behind your wall, not the wallpaper. It works perfectly when you never notice it—and terribly when you do. is part of the CID-keyed font, a font