Cant find the settings

The settings : https://prntscr.com/8p2aiq

There are no settings in the admin area?

Ok what is recommended image size because mine is being pixelated and its fixed so when i scroll the background stays while the screen scrolls up and down over it.

ok great thanks plugin removed.

The ideal size for cover pic is the width of the content area.

https://www.movielandwaxmuseum.org/members/tony/profile/ look at the results. pixelated and you see the picture is fixed and does not scroll.