There must be a way to do this without restarting. I have a projector hooked up as my secondary monitor, and if I don't turn it on before turning my computer on, it doesn't show up in the Display Properties. I can access it through the nVidia drivers, but I can only do a clone, which doesn't work well since my monitor and projector aren't the same resolution. How do I make the display properties realize I have two monitors without rebooting?