You can remove a group of highlighted instances and pins from the active cone. You cannot remove nets and ports from a Logical Cone.
To remove only highlighted objects from a cone:
Make sure the cone you want to remove objects from is the active cone.
From the LogicalCone menu, choose Remove From Active Cone>Remove Group. The cursor turns into a color picker pointer.
Click a highlighted object. All objects with the same highlight color are removed from the active cone.
The highlighted objects you selected no longer appear in the active cone view. If some of the highlighted objects are pins, their corresponding instances are removed.
Tip: Click outside a highlighted object, or press Esc to terminate the command.