Ever noticed the Fn key on your Mac or Windows computer? It serves several purposes, but you'll need to learn how to use it. Here's what you need to know.

The function keys are at the top of the keyboard and labeled F and a number from one to 12. To use them, hold the “Fn” button at the bottom of the keyboard while pressing the desired function.

A quick trip to the button-settings screen is all it takes to make your laptop’s power button behave. That’s pretty weird considering that many laptops also have dedicated “sleep” buttons.

I'd like to be able to use my function keys without needing the "fn" key itself when I'm bootcamp-booted into Windows. Any ideas?

However there’s another useful key with excellent keyboard shortcuts mapped to it—Fn, aka, the Function key. This is the button with the globe icon in the bottom-left corner of your Mac’s ...

When you’re done with your message, double-tap Fn again. You can also click Done below the icon or press Return. Apple recommends keeping individual dictations to 40 seconds or less, so don’t ...