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
Click the arrow sign for an object to display the objects grouped below it if applicable.
Click the object for which you want to undo the hierarchical structure.
Click Up one level.
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.