Auto-cad Users were always working on the black screen window, but through this feature you are able to modify the background as you want, like gradient filling and picture, wall etc.
Do you want to make your drawing more interesting?
You can assign an image of your choice or a color gradient to window background of the drawing editor:
*Access the system dialog and select the system tab.
*Select the properties button for the 3D graphics display and turn on render option and enable background.
*Use the background command to set the required parameters of the image and gradient.
*Use the shade mode command to use flat, gouraud or any other or any combination to use the background of your choice.