An inappropriate application will execute over my background and what I do!

I have a little problem for a few hours , I have the top of the bar screen ( above the usual icons of the battery volume and the two icons of the SIM cards). Furthermore , I -always in surimpression- an app that draws lines as if I was drawing and along the bar shows the X, Y movements …
I can not rid myself , I wonder what it is .
To make things worse , the screenshot does not work, so I can not send you the image :frowning:

Seems like you enabled “Pointer location” in developer options.


it was exactly that. Thank you very much , you are great!

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Thank you very much.