How to set Huawei button buoy?

The circle on the screen of Huawei's mobile phone is a floating navigation function, which can be controlled by clicking and long pressing to realize various functions such as returning to the previous level and returning to the main interface. If you want to open it, you can do the following:

Take Huawei P40 mobile phone as an example:

1. First, click to enter the setup menu of Huawei P40 mobile phone, and click down to enter the system. The update option is at the bottom;

2, in the system and update options, click to enter the system navigation option;

3. In the system navigation mode option, click the floating navigation option and turn it on.

4. Turning on this function will not affect the use of full-screen gestures or virtual navigation keys.