How to Toggle Projection Settings

Steps:

1. Press and Hold the windows key on your keyboard Useful Windows Key Shortcuts for Windows 8

2. While Holding the windows key, Press "P" on your keyboard

3. Tapping the "P" key while Holding down the windows keys, will cycle through the options.

PC screen only - content will only displayed on the laptop
Duplicate - the same content will be display on the laptop screen and projector/monitor
Extend - the projector or monitor is a second screen, and content can be dragged from the laptop over to the secondary display
Second screen only - the laptop's screen will be temporarily disabled, and the desktop is displayed on the secondary display

4. Once you have selected the one you want, Let go of both keys to make the change.