what makes a stage space

Flats can be hung from the top of the stage suspended by a bar that is out of audience sight or pushed on from the side of the stage or may be free standing. Sometimes the flats can be "flown in" by way of the Fly Gallery or the Flies. Fly Galleries are common to Proscenium Arch style theatres and consist of a space that exists high above the stage area. Ropes are used at the side of the stage to control sets, curtains and lights that may be hung from the Fly Bars and lowered down onto the stage or suspended above the stage. The Catwalk is a narrow walkway high above the stage that connects the fly galleries on both sides of the stage.

Another form of movable scenery is a Truck. This takes the form of a low trolley that is either on running tracks or free moving that can have scenery pre-set on it. (for instance a boat, a table and chairs) Sometimes the actors are pre-set on the truck and are wheeled out to start their scene.

A Scrim is a see-through piece of coarse woven hessian or similar material that covers the stage like a curtain. It can be used in a production to separate the action in front and behind it while the audience can still see through to the other side. Sometimes images can be projected onto the scrim.