The Edit menu contains commands for selecting and editing objects in a scene.
Edit Polygons 
Select 
Selects all instances of the selected object. Unavailable if the object has no instances, or if multiple objects are selected.
Transform 
Edit Pivot 
Moves the pivot of each object in the selection to the world center: position (0,0,0).
Duplicate 
Union/Difference 
Group 
Containers 
Selects the container or containers to which the current selection belongs.
Object Properties 