To select the specific Pico video board use the choice button 'Video' (yellow ellipse). Currently 2 types are supported: 1861 Pixie graphics and TMS 9918.
1861 Pixie graphics is the same graphic system used for the Studio II computer giving a black and white screen of 64 by 128 large pixels.
TMS 9918 is a video chip with text mode and different graphic modes, allowing colour screens of 256x192 pixels.