If you install a new font in Windows while Logos is running, Logos doesn't recognize it until you close down and restart Logos. Word is able to do this dynamically, so I know it's possible. I think Windows sends a message out when a new font is installed (or one removed) and if an application handles that message it can refresh its font lists at such time. This would have to be done wherever you have font lists if they are not all drawing from a single list in memory (Highlighting panels, Notes, etc.)