Originally Posted by da_jane
The full version of Acrobat allows you to change the font and font size but it is a costly piece of software.
Exactly. Either in the Standard or the Pro version of Adobe Acrobat, you can edit PDFs almost as if it were a word processor (e.g. use the Touchup Text tool in the Advanced Editing toolbar).
Another app that allows you to edit PDF files is Adobe's Illustrator.
Problem: Neither of these programs are cheap.
Alternatives: Foxit PDF Editor, Infix from Iceni Technology (downloadable as a demo).