'Pre-View' - opens current image in full screen mode. If it is more than screen - you can move it by joystick. You cant exit from preview mode by pressing '#'. Also you can fast enter to preview mode - in 'Commands menu' press '#' (or in painting window 'JoyRight'-'#'). Press '*' key to enable/disable showing of 2D set of 5x5 current images (for checking of seamless textures/game map elements). Press left soft-key to switch between preview of image/clipboard. Fullscreen preview on touchscreens: touch picture to hide/show virtual keyboard.