Xiaomi's mobile phone always displays a line on the desktop. How to get rid of it?

It is a floating window for security software to monitor the desktop.

It is a floating window on the security software monitoring desktop. Enter security settings, memory monitoring. Cancel desktop icon. When you need to clear the memory again, just click the function key in the lower left corner and then click X.

In Advanced Settings in Settings, click Accessibility, click Zoom in Gesture, and then select it.

It is possible that the music app (or third-party music app) in your mobile phone has turned on the lyrics function. I suggest you check it and turn it off to see if you can solve the problem.

If your system is a development version. The cpu running value is displayed. There is a cpu speed option in the set development options. If it is off, it will not be displayed.