Look for a line where the "font" column reads something like F1 or Arial+F1 . The "type" column will show CID TrueType or CID Type 0 .
: Determine if "f1" refers to a specific classification within the CID font system. Sometimes, such designations refer to the font's intended use, language support, or specific typographic features. cid font f1 family
CIDFont+F1 font family is not a standard typeface designed for aesthetic choice but is instead a technical placeholder name Look for a line where the "font" column
This happens frequently with "orphaned" PDFs. If a document was created years ago using specialized publishing software that utilized a custom CID font, and that document is opened on a modern machine without that specific font installed, the software cannot find the glyphs. It sees the instruction "Call F1" but doesn't know what "F1" looks like. Sometimes, such designations refer to the font's intended
: In Adobe Illustrator , importing the PDF and using the Transparency Flattener to create outlines can bypass the need for the specific font entirely.