Go to Setting->System Setting->Select "System Mode" from the dropdown list: 2*1080P@25/30+D1@25/30 or 1*1080P@50/60
🧙♂️Tips: If "1920x1080P@30HZ" is shown in the video input, that means no video source is detected via HDMI. Please check whether HDMI cable is well plugged in or not.