what is hotkey for open all selected groups and its sub objects

Hi guys,

I look at the user guide, i couldn’t find anything about it.

Is there any shortcut keys that I can after selected the group, pressing shortcut keys to (1) open all its group’s sub objects. and (2)close all the groups

Thanks in advance.

Hold down alt when clicking on the group.

If you’re selecting more than one object (multiple objects highlighted) you can hold down Alt and the left arrow key and it will open all of them simultaneously!