How to Add a Second Monitor to Your Computer
Adding a second monitor to your computer lets you double your computer’s desktop, allowing you to work on one monitor while eyeballing your reference materials on the other. You can double the size of your cockpit in the latest flight simulator. Or you can keep Facebook or Twitter running on your spare monitor to keep up with your friends.
Obtain a new monitor that’s compatible with your computer.
Alternatively, you can use an old monitor from your old computer.
Push the plug on the end of your new (or old) second monitor cable into your computer’s video port on the back of your computer.
The cable should only fit into one port, be it DVI, VGA, or HDMI.
Plug the cable’s other end into your monitor’s matching port.
Again, this port may be DVI, VGA, or HDMI. Plug the monitor’s power cord into the wall or a power strip, and then turn on your monitors and your computer.
Right-click a blank part of the desktop and choose Screen Resolution from the pop-up menu that appears.
Both displays appear listed onscreen. Click the Detect button if Windows can’t find the second monitor. Click the icon that represents your main monitor and choose Make This My Main Display. This step specifies which monitor should display your Start button and taskbar.
On that same screen, drag and drop the onscreen monitors until they resemble the way you’ve arranged them on your real desk.
You can tell Windows to spread the desktop to the left or to the right, depending on how you’ve arranged your two monitors. Or, if you work on long spreadsheets, stack the two monitors on top of each other with a shelf to double your rows of numbers.
Click OK when you finish.
Windows saves your monitor arrangement.