Open Mobility Center
Use the hotkey Win+X to quickly launch mobility center.
You could also find it in the Start menu.
Windows Mobility Center Features
Mobility Center gives you access to features relevant to laptop users.
This is a quick overview.
Display Brightness
By default Windows Vista dims the screen when on battery mode.
you could easily adjust the brightness here.
Volume
you could easily change the volume or mute it entirely.
Battery
Change the current power management scheme.
web connection Center
Quickly turn wireless networks on/off.
External Display
Change your external display options.
Just go for the Connect display button to choose how you want the display.
Screen Rotation
If you have a Tablet PC, you could change the rotation of the screen quickly.
Sync parameters
Sync offline folders or devices quickly.
Presentation parameters
Connect to a projector easily.