Most mice have a scroll wheel. Sure, it takes you up and down on a page, but in combination with other keys, it can do much more:
- Scroll sideways: In many versions of Excel, holding down the shift key while scrolling will take you sideways. That’s super helpful in a big spreadsheet.
- Scroll wheel as back button: In most web browsers, if you hold the shift key while using the scroll wheel, it works like the back button: You can fly through all the sites you’ve recently visited. (Some mice have side buttons that work like back and forward buttons in your browser, too.)
- Scroll to zoom: Holding ctrl and scrolling lets you zoom in or out of the page you’re viewing. Ctrl-scroll up zooms you in; ctrl-scroll down zooms you back out. On a Mac, this trick will zoom in and out your whole screen, not just the document you’re in.