Clone

Make a selection. > Edit menu > Clone

Make a selection. > Hold down SHIFT key. > Move, rotate, or scale the selection with the mouse.

Clone creates a copy, instance, or reference of an object.

With the Clone command you can create copies, instances, or references of a selected object, or a set of objects.

The Clone command on the Edit menu creates a single copy of your selection. You can clone multiple copies by holding down the SHIFT key as you move, rotate, or scale your selection. Both techniques display the Clone Options dialog.