Programming of a multi-projector multi-image show was generally done on one of several systems such as Arion, Audio-Visual Laboratories (AVL), Electrosonic, Clearlight, Dataton, UAV, Spindler-Sauppe and Multivision. The programming itself was done on a system that allowed for input by the programmer and dissolve unitsAVL Genesis Procall-X which were attached to the projectors and controlled the functions of the projectors based on the programming instructions. Programming could also be used to control room lights, rewind of the audio tape and resetting of the projectors, and to trigger other effects that might be used in the presentation, such as a strobe light.
