The reason why the four-way monitoring switch 720576 mode does not display the menu is because of the resolution setting of the monitor.

1. When it comes to monitor display, resolution is a very important parameter. Resolution refers to the number and arrangement of pixels on the display screen. For a given screen, the higher the resolution, the more detail and clearer images can be displayed. The four-channel monitoring switch to 720576 mode is caused by incorrect resolution setting. 720576 is a resolution that means there are 720 columns of pixels and 576 rows of pixels on the screen. This resolution does not support menu display in some cases. When the four-channel monitoring is switched to this resolution, the menu will not be displayed.