Large undivided curtain, usually white, which hangs upstage Dressing Room Changing room. No food allowed Electrics Row of lights hanging above the stage.
Most downstage row is called first electrics, etc.
Flat A wooden frame covered with painted material to be part of a set. Waiting room backstage, food, drinks, talk allowed. Costumes not allowed. Heads Up Look above you and be prepared to move. Something is coming down.