The Common effect deletes all of the selected objects except for their overlapping areas.
This effect will be always applied to the topmost object. If you want to apply the effect to other objects underneath, first group the top objects.
Original Objects
Objects after Common effect
See Also
Using the Combine Effects
Applying Weld Effect
Applying Weld by color Effect
Applying Cut Out Effect
Applying Remove Overlap Effect
Applying Exclude Common Effect
Applying Fuse Effect
Applying Separate Overlap Effect