Mosaic® MediaManager is part of a suite of utility applications that works with the Mosaic Designer™ software and Show Controllers. MediaManager provides a simple interface so users can easily change pixel matrix content. Using this discrete application allows the programmer to focus on configuring a system, and lets the facility determine what content is used, based on a changing schedule of events. MediaManager permits the use of user-defined content, as well as any of the built-in effects offered within the Mosaic Designer software. A built-in tool allows for simple, but reliable simulation of the media effects prior to loading them into the Mosaic controller. The new media content can be updated at any time, including scheduled uploads using the Mosaic RemoteManager software.