Rotate Your Computer Screen in Windows 7
Multiple monitor support gets better in Windows 7. Now you can rotate the picture from landscape to landscape.
The standard orientation of our computer screen is usually horizontal (also known as the scenario) but in the portrait mode the monitors (where height exceeds the width) can be very useful for doing the tasks for which Lots of scrolling is required (like reading long web pages).
Under Windows 7, there is a new option under Display Settings that can help you to flip the screen from the screen to landscape mode (and vice versa) without the need for additional software.
It can be very easy if you are using Dual Monitor setup with Windows 7, where you want a screen in the default horizontal mode and want to read other content in vertical mode.
You will still rotate the other monitor manually into 90 degrees (like this screenshot), but this is a one time task.