In your library folder, under fonts, is a file called, “FontTags.BL”. This file is used to store the categories you have created, as well as other information including display names for fonts. It is a text-based file, meaning you can edit it manually if you know what you’re doing. We suggest you don’t. This file can move with your fonts from one computer to another, even across operating systems, so that your work cataloging fonts can be used on all your Platform installations.