If you use Huawei mobile phone, take Huawei nova 8 mobile phone as an example:

First, open the split screen:

1. After opening an application, slide the screen from outside to inside on the left or right side of the mobile phone screen, and pause to bring up the smart multi-window application bar.

2. Long press and drag the application icon in the application bar to the screen to open the split screen.

Second, split screen interchange:

Press and hold the bar at the top of the split window until the split window shrinks, and then drag the window to another split window.

Third, exit split screen:

Hold down the horizontal bar or vertical bar on the middle line of the split screen and drag until another window disappears.

Tip:

Some applications do not support split-screen display.

Only two split-screen applications can be used at the same time.