These are not just arbitrary labels. They represent specific that dictate how a font maps character IDs (CIDs) to glyphs. Understanding these six types is essential for prepress operators, software developers, and typographers working with multilingual documents.
If the text looks like gibberish, try selecting all text and changing the font to a standard one like , as these are the most common "f1/f2" mappings. Are you seeing this in a specific software or while trying to print a document CIDFont+F1 issue - Adobe Community cidfont f1 f2 f3 f4 f5 f6 full
In Linux environments using Ghostscript, a common warning is: Substituting font CIDFont=F1 for ... This means the system could not find the font referenced by the F1 identifier and is falling back to a default (often Courier or a generic CIDFont). These are not just arbitrary labels