You're the best. Thank you.
fyi I had this idea but didn't try because it says "Custom Category", I thought you can only choose one. Works perfectly now.
I was wondering if nodeBB can be configured so that topics can be created within groups rather than general categories.
For example, from the "Gamers" group page, can one create a topic such as First Person Shooters or PS4 vs Xbox One or something like that so any topics created in that group are specific to that group rather than specific to a category?