Here is a quick tip that may come handy in one day when you need to turn off background image on your desktop. for whatever reason.
Click Start button and Settings to open Settings app. Then choose Ease of Access.
In Ease of Access window, go to Other options, and then you can toggle on/off the setting called Show Windows background under Visual options.
There are actually a few other options you can toggle in the Other options window. For example, I can disable the play-animation in windows to get an instant action when minimizing or closing a window. I can also make the notification sidebar to stay a bit longer when it pops up.