An audio cable used in theatre that deliver a balanced signal that has less unwanted noise from outside electrical interference.

The changeover between one show and the next.

Non-theatrical illumination of a performance space when a show is not in progress.

An opening through the stage floor.

A low-level fill light, usually aimed form the FOH positions.

A stage curtain upstage of the act curtain that opens to the right and left rather than moving up and down.

The command taken directly from the action in a show, rather than from the stage manager, to carry out a particular operation.

A cabling device used in theatrical stage lighting that allows two stage lighting instruments to be connected to one circuit.

An organization which aims to advance the skills and knowledge of theatre, entertainment and performing arts professionals involved in the areas of design, production and technology, and to generally promote their interests.