Here’s a structured breakdown:
If you have ever extracted a PDF generated by Adobe Illustrator, InDesign, or a legacy PostScript printer driver, you may have stumbled upon a strange sight in the font list: CIDFont+F1 , CIDFont+F2 , extending all the way to F6 . To the untrained eye, these look like corrupt or temporary font names. In reality, they are the backbone of robust, cross-platform printing. cidfont f1 f2 f3 f4 f5 f6 full
Thus, you see: