What is the FN key on the keyboard, and how does it work on Windows and Mac?
The keyboard is one of the most important components of any computer, whether laptop or desktop. It is the primary control tool, used for everything from typing to running shortcuts and adjusting system settings.
But of all its keys, there's one that's often overlooked, despite its usefulness: the Fn key. It's found on most keyboards, has no intuitive symbol, and doesn't perform any automatic operations. However, its function is essential for accessing additional commands, especially when combined with the F1 to F12 keys.
What's even more interesting is that its functionality varies significantly depending on the operating system. In other words, it doesn't work the same way on Windows as it does on macOS. Therefore, a good understanding of how it works allows you to get the most out of your computer, adapt its functions to your work style, and save time.
What is the Fn key, and what are its uses?
It is worth noting that Fn is a modifier key, like Ctrl, Alt, or Shift, which means that it does not perform any actions on its own, but when combined with other keys, it allows you to access hidden or alternative functions, especially using the function keys at the top of the keyboard.
With it, you can adjust the brightness, raise or lower the volume, pause a song, activate airplane mode, or control the keyboard backlight, among other functions.
This feature was primarily designed for laptops, where limited space necessitates assigning more than one function to each key. However, even on desktop keyboards, its use has become widespread, so you see it there on the left but rarely take full advantage of it.
How does the Fn key work in Windows?
In Windows, the F1-F12 keys typically perform standard system or program operations. F5 refreshes the webpage, F2 renames files, and F1 opens the Help menu. However, pressing the Fn key along with one of these keys activates a secondary function built in by the manufacturer.
For example, the Fn + F8 keys can mute the sound, while Fn + F10 alone activates the application environment. Some laptops allow you to modify this behavior from the BIOS or UEFI by enabling an option called "Action Keys Mode."
When enabled, this restores functionality, allowing you to use the multimedia keys directly without needing to press the Fn key. However, if you prefer the classic F key shortcuts, you can leave the default setting.
This key in Windows acts as a switch between two functions: operating system commands and hardware functions. If you use your keyboard frequently, learning how to use it allows you greater freedom of movement, boosting your productivity.
How does the Fn key work on a Mac?
On macOS, the opposite is true: the F1-F12 keys directly activate system functions, such as lowering the brightness, pausing a song, or increasing the volume. If you want these keys to function like "regular" F keys—as in code editors or design programs—you'll need to press the Fn key along with them.
Fortunately, you can change this behavior in the settings. To do so, go to System Settings > Keyboard > Shortcuts > Function Keys, and then select to use F1, F2, etc., as the default keys. After that, system functions will only be activated by holding down the Fn key.
In addition, Apple has improved the flexibility of this key. On modern Macs, you can assign specific functions to it when pressed alone. This makes Fn more than just a modifier; it's a customizable tool that makes your daily tasks easier.
This article covers all the FN keyboard shortcuts: learn the function and secrets of the Fn key on your keyboard to use your computer like a pro.