When I change the background color in one profile it changes it for all the profiles.  I'd like to have one profile for a white background and a duplicate but with a black back ground.  I have uninstalled and deleted everything that has to do with DraftSight and then reinstalled.  No help.  I am changing it in Tools>Options>System Options>Display>Element Colors>Model Background.  I've also tried it with Tools>Options>System Options>Graphics Area>Show Back Ground, checked and unchecked.  If this is not possible is there a command string I could tie into a button to switch the background to black and another for white?