Cut the selected object or group and put it on the Clipboard
Copy
Copy the selected object or group and put it on the Clipboard
Paste
Insert the object or group on the Clipboard.
Paste Mirror Clone
While you can use "L" to make an exact mirror image of any object,
you can not edit the mirror image. If however you copy the original object and
use Paste Mirror Clone you will create a real new obejct that can be
modified independantly of the original.