How does iPad air2 set to cancel the automatic rotation of the screen?

How to set ipad air2 to cancel automatic screen rotation is as follows:

The first method:

Open the screen setting options, and then click General Options to enter the general interface, find the lock screen rotation, and click.

The second method:

Click AssistiveTouch (the moving circle on the screen) to find the function of "locking screen rotation".

The third method:

If all the above methods solve the problem that the screen can't rotate, my personal suggestion is to restore the system or go to Apple's after-sales service point for consultation.