Specifying an encoding format for PDF files
ASCII and binary are encoding formats for documents. When you publish a file to PDF, you can choose to export ASCII or binary files. The ASCII format creates files that are fully portable to all platforms. The binary format creates smaller files, but they are less portable, because some platforms cannot handle the file format.
Document encoding is not related to text encoding. For information about setting encoding options for text in PDF files, see “Working with text and fonts in PDF files.”
To specify an encoding format for a PDF file