You can enter the main menu of the recorder-system configuration-preview configuration interface to set the image corresponding to the output port. "HDMI/VGA" means that HDMI and VGA can be output at the same time, and the output picture is the same; if HDMI and VGA can be set separately, it means that the two video output ports can be connected to an external monitor at the same time, and the pictures can be different. The output screen of BNC can generally be set independently. If the video recorder has two HDMI and two VGA output ports, it also supports simultaneous connection to the monitor output.