collapse group with keyboard shortcut

[789lwnm2]

Is there a way to expand/collapse grouped tracks with a keyboard shortcut?
so a normal audio or midi track can be expanded or collapsed with ctrl+right/left arrow.
if I do this with a group track it gets higher (shows/hides a automatisation dropdown, the track volume and paning).
but I would like it to show/hide all the tracks that are inside the group... know what I mean? excuse my bad english.

[ricomz]

Select the group track, then use + to expand a group and - to collapse it

[CowBell]

I have to hold SHIFT with the plus operator