The Highlight Calculation Area Group command is used to highlight all of the calculation areas in a calculation area group.
To highlight grouped calculation areas on the drawing, go to
Ribbon: DM Electrical->Point-by-Point Photometrics-> 
Highlight Calculation Area Group
Pulldown Menu: DM Electrical->Point-by-Point Photometrics->Highlight Calculation Area Group
You will be prompted to identify a grouped calculation area to highlight.
Select calculation boundary:
All of the calculation areas that are grouped with the selected calculation area will be highlighted on the drawing.
To remove the highlights, use the standard CAD REGEN command.