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