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Every computer monitor has what's called a refresh rate — essentially, it's the speed at which your monitor can draw, then redraw an image. Even if the image on your screen looks static, ...

It’s easier to see smudges and dust on a black screen, so turning off your monitor makes it easier to see what you are doing. It’s also safer for you and your computer.

Get yourself a sweet two-monitor setup. You won’t regret it. The process isn't time-consuming or expensive, but you will need the right cables.

How to Mirror a Computer Display. Windows 7's mirroring ability enables you to work on your own computer or laptop, and also display your work on a secondary monitor.