The Trace Architect's Switches command is used to trace a switch layout from another drawing that does not have Design Master entities.
Before using this command, create switches using the Switch Project Schedule command.
This command should be run on the drawing from which you are copying the switch layout. Do not run this command on the drawing you are using for your electrical design.
To trace a switch layout, go to
Ribbon: DM Electrical->Devices-> 
Trace Architect's Switches
Pulldown Menu: DM Electrical->Receptacles->Trace Architect's Switches
The Background Mapper dialog box will appear.
Background Mapper Dialog Box
See the Trace Architect's Light Fixtures section for more information about how this command works. The Background Mapper dialog box works the same in these two commands.