How to remove white lines from the screen

[Neko_PvP (あかね ナオミ)]

[ClockworkOcean]

You dragged an editor window, and it’s waiting for you to drop it. You can either drag another window around, or quit the editor to reset it

[M1NDOFM1NE]

Thank you good sir, Thank you…

[M1NDOFM1NE]

for anyone still wondering here’s the issue, you need to separate them