|If the graphics built in to the laptop does not support more than the internal and one external monitor, then that is it, there is nothing you can do about it. Your external monitor probably just mirrors what was on the internal monitor, so you are limited to one desktop area, not an extended area. If it were a desktop, you could easily change or add a graphics card, but on a laptop you are stuck with what they integrated in to it. You can try updating your graphics driver from the Dell site, but I doubt that it will help. You are left with two choices if you need more 'real estate' to work with, one is to get a larger wide screen monitor and choose a high resolution (if your graphics supports it and it does not effect your portable monitor), or get a 'desktop' for working at your desk. A mid tower computer will allow more expansion, typically more speed, and a flexibility you do not get from a portable, plus it can be custom built for your specific needs for only a little more than stock (depending on those needs).|
You have to be a little bit crazy to keep you from going insane.