Wow! Menus just like a "big" projector. The GP1 has most of the typical adjustments found on business projectors, and also allows you to save settings. You will find all the usual suspects, including color mode selection, brightness, contrast, color saturation, tint, sharpness, color temp and other settings, as seen in this photo of the main picture menu.
In addition, you'll find other typical settings like the ability to move the menus to different locations on the screen, timers for auto power down function, and blank screen. Of course you can select sources from the menus as well. Other niceties include a high altitude mode (faster fan speed), aspect ratio (auto or manual selection), and a lot more.