On the upper toolbar click on GALLERY and look for backgrounds. You can drag and drop. However, you may find some buttons disappear after you drop the background. SELECT the background (get the little red ring all the way around it) and from one of the top of the page menus (? EDIT menu?) click on move to back or whatever they call it.
That pup takes a little time to set up, but it is purty.
There is no truth anymore. Only assertions. The internet world has no interest in truth, only vindication for preconceived assumptions.
