If your monitor connect to different cameras. There're 2 ways for you to check multiple screen in the baby monitor.
Method 1:
Click "display mode" in the monitor, you can choose "split screen", then you can see the screen is divided into different screens in the monitor at the same time. (However the "split screen" function is support to view 2 different screens at most)
Method 2:
Click "display mode" in the monitor, you can choose "auto switch mode", then you can see different screens will be displayed and switched one by one. (However the "auto switch mode" function is support to view 4 different screens at most)