You can hierarchically group any objects both in rows and in columns. All actions performed on the top object are also performed on the subordinate objects.
Procedure
The object is placed one level higher in the hierarchy.
Tip
Select adjacent objects by holding down the Shift key and clicking the first and last object. You can select objects that are not adjacent by holding down the Ctrl key and clicking the relevant objects. You can extend or reduce your selection using the arrow keys.