To edit a room’s definition, go to
Ribbon: DM Electrical->Buildings and Rooms-> 
Edit Rooms
Pulldown Menu: DM Electrical->Building Definition->Edit Rooms
Room Electrical Design Criteria Dialog Box
See the Common Schedule Dialog Box Features section for more information about how this dialog box works. This section describes the Rename, Find, Previous, Next, Save, and Delete buttons.
There is no Copy button in this dialog box. To copy a room, use the standard CAD COPY command to copy it on the drawing.
Select from Drawing: Press this button to select the room from the drawing. You will be prompted to select a point inside the room.
Specify point inside room:
The dialog box will be reopen with the selected room active.
Check the box beside a setting to change it. See the Common Building Definition Information section for more information about the room settings.