Abstract: A method for controlling a system for presenting to an audience images on a primary display or displays that incorporates a auxiliary monitor. The auxiliary monitor may be used in a variety of ways to assist in the presentation of information on the primary display. The preferred embodiment of the present invention contains a hand-held display control including an array of key switches providing control of the main monitor and an auxiliary monitor allowing the operator to view any one of several options. These options include a duplicate of the image being displayed on the main monitor, the next image to be displayed on the main monitor, any other image available from the image generator, a list of the images available from the image generator, and notes associated with each image or with the entire presentation.

Abstract: An improved rack assembly is provided which includes an improved configuration for mounting multiple enclosed circuit boards. The rack assembly includes improvements in heat sinking power supplies incorporated within the assembly, relative adjustability of various elements of the rack after assembly, and ventilation of the rack during operation in an efficient manner.