How does Apple's mobile phone turn on dual-screen mode?

Apple mobile phone dual-screen mode opening method is as follows:

Tools: iPhone 1 1

Operating system: iOS 14.4. 1.

First, open Apple 1 1 to enter the desktop, and click Settings.

Second, enter the mobile phone settings menu and click the auxiliary function.

3. Enter the menu of auxiliary functions and click Touch.

4. In the touch settings menu, click to open the convenient access function.

Fifth, open the convenient channel, tap the Home button twice, and the phone will split the screen.

6. Click the arrow in the black area to restore the phone screen.