No doubt you use your mouse’s scroll wheel to scroll up and down in browser windows and in programs like Microsoft Word – perhaps without even realizing it. If you’re a gamer, you may even ...

A left click lets you select and drag items, right-clicking opens the context menu for additional options, and the scroll wheel allows you to move up, down and even sideways.

If you’ve ever noticed a small button on your mouse near the scroll wheel, chances are it’s the DPI switch. Many people ignore it or press it accidentally and suddenly wonder why their mouse ...