If you wish to change the height of a light-obstructing object after it has been inserted, go to
DM Electrical
Outdoor PhotometricsChange Existing Light-obstructing Solid Elevation
You will be taken to the drawing and asked to select which objects you wish to edit. You may select as many objects as you wish to have the same elevation by clicking. Press Enter. The Edit Photometric Solid Elevations dialog box will appear.
Enter the appropriate values and press OK. The command is complete.