Objects can be grouped together. A group of objects behaves as a single object when you move or resize it.
To group selected objects, choose Arrange> Group (Cmd-Opt-G) in the menu.
To ungroup objects, select the group and choose Arrange > Ungroup (Cmd-Opt-Shift-G) in the menu.
Nested groups are supported. A nested group is a group that includes a smaller group.
Some controls available for individual objects may be locked when such objects are inside a group.