The names do not refer to a specific "free font" available for download. Instead, they are generic placeholders created by PDF exporting software when it fails to properly embed the original fonts.
This is a specific request related to . "CID Fonts" (Character Identifier fonts) like F1, F2, etc., are not standard font names (like Arial or Times). Instead, they are font registry placeholders used internally by Adobe Acrobat, Canon imageRUNNER devices, and older RIP software. CID font F1 F2 F3 F4 F5 F6 F7 Fonts Free Download
Websites offering "CID Font F1 Free Download" are often misleading. They may provide a generic substitute font, but it will likely not match the specific typeface used in your original document because "F1" is not a unique font name. CID F1 F2 F3 F4 F5 F6 F7 Fonts Free Download - Web Fonts The names do not refer to a specific
Since these aren't "real" fonts you can download from a font library, you cannot simply install them. Use these methods to fix the display issues: Open the PDF in Adobe Acrobat Pro . Go to Tools > Print Production > Preflight . "CID Fonts" (Character Identifier fonts) like F1, F2, etc