Allows you to select all embedded or unembedded fonts in a PDF document.
The selection of embedded fonts includes OpenType embedded fonts.
Embedding fonts in a PDF document means that every character of this font is copied and stored in the PDF document. This is useful if you create PDF documents to be displayed on different systems and to be printed on different devices: these are often systems that do not contain exactly the same fonts.
Embedding a font as a subset means that only those characters of the font that are actually used in the text are embedded. This reduces the file size by not including superfluous font information.
OpenType is an extension of the TrueType format that can contain TrueType and/or Type 1 font data. In PDF files it can only appear as an embedded font. It has been introduced in PDF 1.6.