In older versions of Windows using an external projector with your laptop can be a difficult task. It seems like every laptop has a different function key combination to enable output for a projector. In Windows 7 that has finally been improved. Now, all you have to do is hit the Windows Key + P and the projector menu will be displayed.
The on-screen display will allow you to:
- Show Desktop only on Computer
- Duplicate Desktop on Projector
- Extend Desktop to Projector
- Show Desktop only on projector
If you don’t like keyboard shortcuts you can also create a desktop or taskbar shortcut to the projector menu. To do that, create a shortcut to "C:\Windows\System32\DisplaySwitch.exe".
Displayswitch.exe also has command line parameters that allow you to create a shortcut that will set a specific display mode.
If you wanted to create a shortcut that would turn off your external monitor then point a shortcut to "C:\windows\system32\displayswitch.exe /internal".