The Remove Calculation Area from Group command is used to remove a calculation area from a calculation area group.
To remove a calculation area from a calculation area group, go to
Ribbon: DM Electrical->Point-by-Point Photometrics-> 
Remove Calculation Area to Group
Pulldown Menu: DM Electrical->Point-by-Point Photometrics->Remove Calculation Area to Group
You will be prompted to identify which calculation area is to be removed from a calculation area group.
Select calculation boundary:
The calculation area will be removed from the group.
You will then be prompted for the insertion point for the calculation schedule for the selected area.
Specify insertion point for photometric schedule:
Specify an insertion point to insert the calculation schedule at that point, or press ENTER to finish the command.