Hello Everyone.  I am new to CAD and a friend suggested Draft Sight.  I like it more than the AutoCad 12 that I just learned with.  If I leave the model space up for a few minutes without activity the area goes black and many times I have to close the drawing to get started again.  Sometimes my desktop appears in the model space.  I am guessing it is a display setting but it is a guess.  Anyone experienced this?

Thanks!