To turn room layers on so that room outlines and room labels are displayed on the drawing, go to
Ribbon: DM Electrical->Buildings and Rooms-> 
Turn Room Layers On
Pulldown Menu: DM Electrical->Building Definition->Turn Room Layers On
The room outline and room label layers will be turned on and will be visible on the drawing.
By default, these layers are non-plotting and do not have to be turned off before plotting.