Refers to the type of controls on a projector. A typical menu-driven system, will first offer a menu of major categories such as Computer, Video, Audio, Display, Options. After selecting Computer, you will get another menu of choices with items like brightness, contrast, number of colors, color balance, sync. Select one of those and you can then adjust it. Many projectors which are menu driven, also offer the most widely used functions in a non-menu fashion, such as separate buttons on the remote for volume, brightness, and contrast, as well as switching between channels/sources.