If your video recorder supports multi-screen, click the right mouse button on the desktop-screen display or channel display, etc. That's probably what it means. After clicking, 1 picture, 4 pictures, 8 pictures, 16 pictures will appear. Menu is the display menu key, which can bring up the display adjustment menu, which contains all the adjustments to the display function. How to display various menus on the screen? How to use the settings of Canon SLR camera to display various menus on the screen? Canon 90D Operation II. Menu button function and menu structure, so only four menus are normal.