What is the Fn key on Mac?

Answered by Phillip Nicastro

The Fn key on a Mac keyboard is a key that allows you to access additional functions or shortcuts on your Mac. It is typically located in the lower left corner of the keyboard, right next to the Control key. On newer Mac keyboards, the Fn key is labeled with the letters ‘fn’ and a globe icon, while on slightly older keyboards, it is simply labeled ‘fn’.

The primary purpose of the Fn key is to enable the use of alternate function keys on the top row of the keyboard. These alternate functions are typically marked with symbols or icons on the keys themselves. By pressing and holding the Fn key while pressing one of these function keys, you can access the additional functionality associated with that key.

For example, one common use of the Fn key is to control the brightness of your Mac’s display. On the top row of the keyboard, there are typically two keys marked with sun icons, one to increase brightness and one to decrease brightness. To adjust the brightness, you would hold down the Fn key and then press the appropriate key.

The Fn key can also be used to control the volume of your Mac’s speakers. On the top row of the keyboard, there are usually keys marked with speaker icons, one to increase volume and one to decrease volume. Again, you would hold down the Fn key and then press the desired volume key to adjust the volume.

In addition to controlling display brightness and volume, the Fn key can be used for other functions as well, depending on your specific Mac model and keyboard configuration. Some examples include controlling media playback (play, pause, skip), activating Mission Control or Launchpad, toggling the keyboard backlighting on MacBook Pro models, and more.

The specific functions and shortcuts associated with the Fn key may vary depending on your Mac’s operating system version and any customization settings you have made. It’s worth noting that not all Mac keyboards have an Fn key, particularly some compact or wireless models. In these cases, the alternate functions may be accessed through other means, such as using key combinations involving the Control or Option keys.

In my personal experience, I have found the Fn key to be quite useful for quickly adjusting brightness and volume on my MacBook Pro. It saves me the trouble of having to navigate through menus or system preferences to make these adjustments. Additionally, I have found the media playback controls accessed through the Fn key to be handy when listening to music or watching videos on my Mac.

The Fn key on a Mac keyboard provides access to additional functions and shortcuts, particularly on the top row of the keyboard. By holding down the Fn key and pressing one of the function keys, you can activate the alternate functionality associated with that key. Its specific uses may vary depending on your Mac model and keyboard configuration, but it is often used for controlling display brightness, volume, media playback, and other functions.