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.
- /internal
- /clone
- /extend
- /external






We have a splitter cable coming off the VGA port on the PC, one end goes to the projector the other end to the PC’s LCD display. As soon as we plug the projector into the splitter cable the desktop LCD goes black. The teacher needs both the projector and desktop viewable at the same time.
Any suggestions on how to do this?
Thanks,
john