A PDF of the differences can be generated from the File->Print Pdf menu.
The PDF will be generated from the current screens, so make sure any settings like context and ignore are done and you have regenerated the diff.
The following choices are available (command line flag in parens):
From the command line you can also give -printFont <ttffile/afmfile>. See Usage for all command line flags.
The font size is automatically scaled to fit the given characters per line. The GUI will give you choices that fit all or most lines in that line length. Longer lines will be wrapped.