How to show four views of cameras on one screen?

Hello, dose everyone know How to show four views of cameras on one screen?

You can define the portion of the screen where a camera appears setting the Normalized View Port Rect field in the Inspector, or camera.rect in the script. If you set the view port XYWH fields of the cameras to [0,0,0.5,0.5], [0.5,0,0.5,0.5], [0,0.5,0.5,0.5], [0.5,0.5,0.5,0.5], for instance, each one will display it’s image in a quarter of the screen. If the viewport of a camera overlaps other camera’s viewport, the field Depth (in the Inspector) is used to decide which one is on top of the other.