User's Manual of Led Display Video Controller VX4S/VX4www.novastar-led.com 4Appearance5.1 Front panel①: Power switch.②: Operation screen(Please see the section-Main Interface for detail).③: Knob. To press knob means Enter or OK, rotating knob represents selection or adjustment.④: ESC. Escape current operation or selection.⑤: Four control keyboard shortcuts.PIP:PIP Turn-on/off. The lighting of this key represents the turn-on of PIP; otherwise, PIP is turnedoff.SCALE: Picture zoom turn-on/turn off. The lighting of this key represents the turn-on of zoomfunction; otherwise, zoom function is unavailable.MODE: Shortcut menu of loading or storage of display model. The key is light when entering themodel or shortcut menu, in case of exiting, the key is not bright.TEST: Shortcut of turn-on/off of testing picture. In case of entering testing picture, the key is bright;otherwise, the key is not bright.⑥:Shortcut keys for switching of 10 signal input source. Short press to set as the main screeninput source, and long press to set as PIP input source. the key is bright after press when the videosource has signal; the key flashes when the input of video source has no signal. the setting resultcan be checked while setting on the display screen and OLED screen.⑦: Function keys.TAKE: Display switching shortcut key. After short pressing TAKE key, PIP will be opened; if it hasbeen opened, the switching of between MAIN and PIP will be realized.Fn: Custom shortcut key.