How'd you like to increase your office productivity by as much as 50%? Add a second monitor to your computer setup. Once you do, you'll never go back to using only one monitor again. For example, you can open a document or presentation on one monitor and use the other to conduct research on the Web. Or, see your e-mail arrive as you work. Photo editors really benefit from having an image open on one monitor and the tool bars in full view on the second monitor. Video editing suddenly becomes almost as easy as the TV commercials promise. TIPS: Ask Kim What you need Adding a second monitor to your system is easy. First, you have to check to be sure your computer has a dual-output video card. If it has a single-output card, you'll need to add a second video card. A dual-output video card runs about $100, depending on the specifications. A single-output card costs slightly less. Your computer may already support dual monitors, though, because many newer computers do. Installing a video card isn't difficult, but you may not want to mess with it. An electronics store can install a card for a fee. You could also buy an external monitor adapter, but internal cards perform better. If you use two video cards, the cards should have the same specifications. That way, there will be no lag between the monitors. Choosing a monitor You can use an old monitor if you have one. The experience is better if the monitors are the same size. Even better are identical monitors. These days, you can find bargains on flat-panel monitors. Go for a 19-inch monitor if possible. Otherwise, a 17-inch screen is good. Anything larger than 19 inches may strain your eyes if you sit close. The monitors and computer should have matching ports. Many monitors have both VGA (analog) and DVI (digital) connections. This makes things easier. Before buying a monitor, judge the picture quality in the store. Pay attention to the contrast ratio. This is the difference between the whitest whites and the darkest blacks. Aim for 500:1 or higher. Higher ratios yield more shadow detail. Response time is equally important. This is the time it takes for a pixel to change color. Lower numbers are better. Accept no higher than 12 milliseconds. Slow response time can result in smeared movement in videos. Screen resolution refers to the number of pixels on the display. The higher the resolution, the smaller things like text appear on the screen. Monitors can be adjusted to different resolutions. However, flat panels usually work best at their native resolution, which is expressed by figures such as 1,600 by 1,200 pixels. The two monitors should have the same native resolution. But you may need a resolution other than the native resolution of a particular monitor, so check the monitors in the store to be sure they work for you. You don't need a brand-name monitor. Many companies buy panels from the same manufacturers. But pay attention to build quality. It should have a sturdy feel and solid buttons. A good warranty is also important. Setting up the monitor After you have both monitors connected to your PC, plug in both and turn them on. In Windows Vista, right-click the desktop and select Personalize. Click Display Settings. In Windows XP, click Start, then Control Panel. Double-click Display. Open the Settings tab. In both Vista and XP, you'll see numbered boxes representing the monitors. Click Identify Monitors. A "1" appears on your primary monitor. The other monitor displays a "2." Click and drag the boxes to change the designations. Select monitor 2 and check "Extend my windows desktop onto this monitor." Click Apply. You can then open programs and drag them between monitors. Third-party programs improve the dual-monitor experience. UltraMon ($40) places a taskbar on each monitor. Buttons help you arrange program windows on the monitors and you can apply different wallpapers to each monitor. Multimon does much the same for free. Add Multishow if you want different wallpapers. You'll find links to these programs at www.komando.com/news. — Kim Komando hosts the nation's largest talk radio show about computers and the Internet. To get the podcast or find the station nearest you, visit: www.komando.com/listen. To subscribe to Kim's free e-mail newsletters, sign up at: www.komando.com/newsletters. Contact her at gnstech@gns.gannett.com. Guidelines: You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference. You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference. Read more