I was able to find this somehow when I played before, but it was a long time and now I can't remember.  How do I assign follower groups for the one-click group switching?  Not finding anything clear on UI and wiki doesn't say anything that I've found.

Thanks!

EDIT: Found it with some work.  If you assign your followers normally, then go to the Followers menu (crossed swords), the arrow next to the "Support" banner can be clicked to bring up "Groups"