How to delete control groups?

Age of Empires II: DE Ask for Help
1

Simple question, I wasn’t able to do this in-game. I tried left, right click, escape, delete on the icons of the control groups, but they only disappear when all units/buildings die / are destroyed.

Thanks in advance.

Bonus question: how to make villagers drop-off resources at Town Centre when “right-click garrison” is enabled?

2

Hotkeys -> Group Commands -> Ungroup Control Group (default U)

3

Thanks!
What about villagers dropping-off resources? I cannot use that option if instead of that, villagers garrison inside TC when right-clicking it.

4

It appears, that “right-click garrison” is broken in regards to dropping off resources, so you have to disable it and use normal right-click for drop-off and ALT+right-click for garrison.