[Roy Dennis]

If from the show display window you select the image button, when the folder opens to select a picture, don't select a picture but type a character in the file name box then press open then apply in the show display it will remove your picture and leave a black screen which shows a small cross in the top left hand corner because it can't find a file, it does not show the wallpaper though.

The only other way I think you could get it back to nothing showing is to reinstall and tick the box where indicated to clear previous settings.

Roy.