I'm on SW2016.
I was messing around with customizing my command manager's Sketch tab and managed to delete some items that aren't individual commands, but rather command groups.
For example, I deleted the "Move Entities" item which is actually a dropdown that has several transformation commands available.
I can't figure out how to either reset the Command Manager to factory defaults, or to create dropdown groupings of commands. As a result, if I wanted to have all those commands back in the tab I would have to have them all separate.
For resetting, I've tried all the reset options I can find. I've tried resetting the registry.
For grouping, I attempted the iOS trick of dragging one command onto another.
I couldn't make any of this work.