When the custom UI was implemented, there were multiple slots/pages, however for couple last updates, the amount has been set to be limited to only "default" and "racing", and there dosen't seem to be a keybind to choose between them anymore (unless i am blind). It might not be a problem for some of the playerbase, but a menu option what allows players to control the amount of UI slots would be nice (or at least have more slots to customize).
