Composite font

Allows you to check if the document for the use of composite fonts, and these may be embedded as TrueType (TT) or as Type 1 (T1) font.

Composite fonts (also called “double-byte” fonts) enable you to display special characters of foreign languages, e.g. Asian languages. They are also called double-byte fonts because every character is determined by 2 bytes (16 bits). Double-byte characters may not always be supported in a later stage of the PDF workflow.

You can restrict the check to:

1-byte fonts (Ignore composite fonts), and/or
Fonts that have not been embedded as OpenType (Ignore fonts embedded as OpenType) (as only embedded TrueType fonts are supported in PDF)

Possible fixes

No automatic fix provided.