The big restriction is that the classic Postscript typefaces are not available (no Times, Helvetica, or Zapf Dingbats), and the PDF file must bundle any fonts i

The big restriction is that the classic Postscript typefaces are not available (no Times, Helvetica, or Zapf Dingbats), and the PDF file must bundle any fonts it uses. The pdfsizeopt package will make any PDF smaller, and I think it deletes letters/characters from the included font that are not used. https://github.com/pts/pdfsizeopt https://github.com/pts/pdfsizeopt