Dual monitor setup is easy in Windows 7
In Windows 7, it is easy to add a second monitor by using the new hotkey Win+P. This is convenient when you need to change the display settings during your presentations with a projector connected to your laptop. Here are two methods to set up multiple monitors in Windows 7. Make sure that you connect the external monitors to your laptop or your desktop computer first.
Method 1: By keyboard shortcut "Win+P"
Press the Windows logo key + P on your keyboard. Select one of the following options according to your needs:
Method 2: By the "Screen Resolution" menu
1. Right-click any empty area of your desktop, and then click Screen resolution.
2. Click the Multiple displays drop-down list, and then select Extend these displays, or Duplicate these displays.Note If you cannot see the additional monitor(s) listed, click Detect. If does not work, try restarting your computer and do step 1 to 2 again.