: Standard font formats like PostScript Type 1 and TrueType, designed for Western alphabets, are limited to a maximum of 256 glyphs. This is entirely insufficient for East Asian writing systems, which contain thousands of characters. CID-keyed fonts were designed to overcome this limitation by supporting up to 65,535 characters via 16-bit character identifiers (CIDs).
: Ensure common system fonts or the specific font used to create the document are installed on your computer. Cidfont-f6 Font Free Download
CID is an encoding method used to support large character sets (like Chinese, Japanese, or Korean) or to embed subsets of fonts within a PDF to save file size. Software Creation: : Standard font formats like PostScript Type 1