Press (Windows) or Cmd + P (Mac) to open the print dialogue.
In a PDF file, labels like are simply shorthand internal tags. They stand for Font 1, Font 2, Font 3, and Font 4 .
What (Windows, Mac, iOS, Android) are you using?
This structure allows for much more efficient font handling, especially when embedding thousands of characters from languages like Japanese or Chinese. 2. Understanding "F1, F2, F3, F4" in PDFs
CID Font F1 F2 F3 F4 Better: A Comprehensive Guide to Optimizing PDF Font Resources cid font f1 f2 f3 f4 better
The names , F2 , F3 , and F4 are not specific font brands but rather generic placeholders created by PDF-exporting software when it fails to correctly embed the original font or its name . Key Characteristics of CID Fonts
When a PDF generator processes a document, it assigns system tags to fonts. If the generator encounters an issue—such as restricted licensing permissions, a corrupted font file, or a software glitch—it defaults to creating a composite proxy layout.
The problem? Many PDF generators assign these labels arbitrarily. Without proper metadata, a CID Font F1 might be a Chinese MingLiU, while F2 is a Japanese Gothic. When rendering fails or text becomes garbled, users search for — hoping to fix extraction or substitution errors.
When a PDF or PostScript file is created, the font is often renamed to a standard key to save space and avoid conflicts. These keys are frequently mapped as F1, F2, F3, and F4 . Press (Windows) or Cmd + P (Mac) to open the print dialogue
Standard Type 1 fonts use single-byte encoding. You can only access 256 characters at a time. This is insufficient for:
F1 tells you nothing about the actual typeface. Is it serif? Sans-serif? Monospaced? When a PDF is processed by text extraction tools (e.g., pdftotext or Adobe Acrobat), the output often contains gibberish because the software cannot resolve F1 to a correct Unicode mapping.
These fonts use CFF (Compact Font Format) for glyph descriptions and are typically used with PostScript workflows.
: If you only need to view/print the file (not edit text), you can import the PDF into a new document and use the Flatten Transparency tool to convert text to outlines. What (Windows, Mac, iOS, Android) are you using
This report analyzes the transition from standard Type 1 fonts to (Character Identifier Fonts). It details why CIDFonts are "better" for modern workflows, specifically regarding multi-language support, file optimization, and rendering fidelity.
Standard F1 – F4 (Base 14) rely on the PDF viewer (Adobe Acrobat, Preview, Chrome) to supply the font. If a viewer updates its font library, the document appearance may shift slightly. are typically embedded by the creator. This ensures WYSIWYG (What You See Is What You Get) across all devices and platforms.
. Open the PDF in Adobe Acrobat and navigate to Properties > Fonts tab. This reveals exactly which fonts are missing, allowing you to install them manually.