For direct printing of the Indented Descendant Report and most other reports, UFT uses editor utilities designed in the 16 bit DOS/Win 3.1 era. This limits you to, perhaps, 256 fonts maximum, including the proprietary Rootsfont which does line drawing, superscripts, special characters.
If you have MSWord or an older version of WordPerfect, you can set up UFT to export to those applications in RFT format. Word should let you use up to one thousand different fonts. Otherwise, you may have to settle for trying to get an RFT report into WordPad or some other text editor.
Do a search on this site for keyword "Winword.exe" or "MSWord" or "Wordpad" for further comments by this user and others.