How To Change Backgrounds
To access Backgrounds, just press the "B" key on your keyboard. Or click the bottom icon on the left menu as shown here...

Oh... still here? Cool
Speaking of Backgrounds...
Why can't the png image get a decent job?
Failed the background check.
(Joke Breakdown: Some png images have no background... as in transparent/missing). Red flag for sure.
On a related sidenote: Did you know... You can export Transparent Background (BG) png images in SketchWow.
They "work" great!
Ok... moving on.