To modify a switch box that is inserted on the drawing, go to
Ribbon: DM Electrical->Devices-> 
Query Device
Pulldown Menu: DM Electrical->Modify Devices->Query Device
Select a switch on the drawing. The information in the database regarding the selected switch will be displayed in the Query Switch dialog box.
Query Switch Dialog Box
Changes can be made to the switch in the same way as when it was inserted. See the Insert Switch section for more information.