How to quickly switch the video output of Win7?

Q: How to quickly switch the video output of Win7?
A: Friends who use laptops know that general notebooks support multi-screen output. For example, when we are doing a demonstration PPT, we need to project the screen on the screen onto the large screen. At this time, we need to find the button to switch the screen on the keyboard, many of them use the Fn function key + F2 key to switch, but because of the variety of notebooks, the method of switching the screen display is also different.
If you install Windows 7 system, then switching the display mode becomes very simple. No matter what brand of notebook you are, you only need to press the Windows key + letter P key to open the output mode switching interface. Intuitive, we only need to directly click the corresponding mode with the mouse, or continue to press the Windows key + letter P key to switch directly in various modes. People who often need to demonstrate at this point are very helpful.