Why do I have lines on my screen? (Developer options)

[AC Question]

I have grey, green, red and blue lines along the left hand side of my screen. When I scroll up and down it shows a grey shadow in the middle of it. I think it's because I was playing with the developer options. I don't know how to disable it.

 

[Golfdriver97]

Welcome to the forums. You could try clearing data for settings. That should wipe all changes that were made.