How to quickly split screen function in Win7

In the process of use, some users often need to process some pictures and tables, and often need to split the screen to process files. Win7 has the function of quickly splitting the window. The specific operation is as follows: Br>
When you need to split the screen, you can use the mouse to drag the window to the leftmost side of the desktop. When the picture above appears, you can release the mouse, and the window will automatically occupy the left half of the screen.

Similar to drag the other half of the window to the right, so that you can achieve split screen operation.