Specifies the file to be used for the background image. If the image contains an alpha channel it will be composited onto the desktop background image.
Na-ezipụta faịlụ ka ejiri ya maka inyogo okpuru. Ọ bụrụ na inyogo ahụ nwere alpha channel a ga-ahazi ya n'okpuru inyogo desktọọpụ.