Press it to enter AV IN/OUT adjustment, brightness, color, TFT mode and view mode. Press the button once to enter AV IN / OUT adjustment. Use
Press the button again to enter BRIGHTNESS mode. Use
Press the button again to enter COLOR mode. Use
Press the button again to enter TFT mode. Use
Press the button again to enter VIEW mode. Use
Keep pressing the button for about 1.5 seconds to turn off the TFT display and press it again to resume display.