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.
Yana ƙayyade fayil da za'a yi amfani da wa zanen bangon. Idan zanen na ƙunsa da hanyar alfa, watau za'a haɗa shi kan zanen bangon kwamfyutan tebur.