I just got a new 22 inch screen yesterday, the LG L227WTG-PF. It was $60 off at Best Buy, down from $310 to $250. BTW, for anyone considering buying, this is an amazing monitor. Colors seem accurate, even before calibration. And at $250, it is a steal. But here is my question: In Windows XP, it is very easy to use only the external monitor, and shut off the screen on my laptop. I want to do this because I have the Intel GMA 950, and I am getting low frame rates on expose, dashboard, or spaces. Anyway, in Windows, I just open the Intel driver program, and select the option for use only external display. However, in Leopard 10.5.4, I see only an option to mirror displays and an arrangement diagram in the arrangement tab of the display system preference pane. How can I turn off my laptop's internal screen, using only the external screen. I can't close my laptop, because I don't have an external keyboard or mouse. Thanks for your help in advance.