The room master schedule contains all of the room types that could be used in a project. See the Master and Standards Databases section for more information about using master databases.
To create and modify room types in the master schedule, go to
Ribbon: DM Electrical->Buildings and Rooms-> 
Room Master Schedule
Pulldown Menu: DM Electrical->Building Definition->Room Master Schedule
Room Electrical Design Criteria Master 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, New, Copy, Save, and Delete buttons.
See the Common Building Definition Information section for more information about the values that can be specified for rooms using this dialog box.
See the Import from Project Schedule section for more information about importing rooms to your project from the master schedule.