A grey and red bar just appeared at the top of my phone!! It's displaying like grid numbers. Also, when I touch my screen there is sort of like a trail shown on the phone. Here is a picture of what I'm seeing.
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@userlNL182BSlB it's fine I already found the issue. Go into your Settings and go to Developer Options. Turn off Show Pointer Location.
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@userlNL182BSlB can you attach a screenshot? It sounds like it could be something that was changed in Developer Options.
@userlNL182BSlB glad I could help.😀
And welcome to the Samsung Community by the way!