The circle, which will be discussed later, is a navigation button that can be easily turned on or off using the system settings. It’s unlikely that it will turn on or off just like that, so if you see a circle on the screen, then someone has turned on this functionality. And we will show how to disable it..
An example of what a circle on your desktop looks like.
Find the “Settings” icon on the desktop and tap on it.
Open the System section.
Here is the line “System Navigation”.
Pay attention to the subsection “Navigation button” – click on this name.
Move the switch.
The circle disappeared from the screen..