Autotransformer A mechanical device used to dim lights. They work by moving a handle that physically moves a brush against a coil to change the voltage going to a lamp. Base Paint The color that is put on first. Other colors are then applied over this to create textures. Beam Angle Auto yoke Motorized device allowing the user to pan and tilt a number of different lighting fixtures from the control console. Newer models can also control color scrollers and irises. The part of the light beam where you get the best light. It is measured to be at a level of 50 percent of the maximum intensity of the beam. AWG American Wire Gauge. Beam Projector A beam projector is an open-face fixture that produces a narrow beam of light. The result is an intense shaft of light. B Backdrop The painted back wall used to help create the environment for the play. This backdrop serves two purposes. It helps the audience to better understand where the play is taking place, and it also provides a space for the actors to change their costumes and masks outside the sight of the audience. Beam Spread The part of the light beam that is measured to where you get down to 10 percent of the maximum intensity of the beam. Belaying To secure a rope by winding it in a figure-eight pattern around the cleat. To secure the belay, the final figure eight wrap gets a 180-degree twist before being put on the cleat. Balance The contrast between all the different visual characteristics of a scene. Bevel Gauge Used to check or copy the angle of an existing unit or drawing. It consists of a handle or stock and a blade or tongue, connected by a wing nut. This tool does not measure an angle. It simply copies the angle from something that already exists. Ball Peen Hammer Used mainly on metal instead of wood. A hammer used to