When a PDF renders the raw CID (Character Identifier) streams instead of the formatted font, the document is telling you the truth. It is stripping away the marketing, the serif, the flourish, and the societal weight of typography. It is saying:
The keyword may look intimidating at first glance, but it is simply a PDF’s way of labeling up to four CID-keyed fonts as resources. F1 is usually the first font referenced on a page, F2 the second, and so on. Behind each label lies a powerful system for handling Chinese, Japanese, Korean, and other large-script languages efficiently. cid font f1 f2 f3 f4
The F1 tag is a inside the PDF’s structure. When the PDF reader wants to draw text, it looks for the object labeled /F1 , finds the embedded font dictionary, and then uses the CMap to render the character. When a PDF renders the raw CID (Character
In the quiet architecture of digital documentation, there exists a phenomenon that is simultaneously a glitch, an aesthetic, and a philosophical statement: F1 is usually the first font referenced on