What do you call a narrow flat of scenery attached by a hinge to a wider flat?

The term used to describe a narrow flat of scenery that is attached by a hinge to a wider flat is known as a "flipper." In theatrical design, flippers are utilized to create dynamic scene changes and allow for greater versatility on stage. They can be easily moved to reveal different scenes or elements of the set, enhancing the fluidity of a performance.

Flippers are particularly effective for quick scene transitions, where a narrow flat can be swung open to expose what lies behind it, such as a new set piece or another part of the stage. This design element is particularly important in live theatre, where rapid changes are often necessary to maintain the flow of the narrative.

In contrast, the other terms serve different purposes. A crossover refers to a route backstage that allows actors to move from one side of the stage to another without being seen by the audience. A wing flat is a type of flat used as part of the stage side, helping to define the performance area. A scenic flat is a flat piece of scenery that can represent different backgrounds or structures, but does not have the hinged component that characterizes a flipper.