What Is the Fn Key? A Complete Guide to Function Keys and Shortcuts

If you’ve ever noticed a small “Fn” key tucked away in the corner of your keyboard and wondered what it does, you’re not alone. Almost every modern laptop keyboard includes it, yet many professionals don’t realize how powerful it can be.

So, what is the Fn key? In short, the Fn (Function) key is a special modifier key that allows you to access alternative commands on the function keys (F1–F12) and other keys with multiple functions. Think of it as a space-saving design choice: instead of having separate buttons for brightness, volume, and wireless toggles, the Fn key unlocks those secondary commands.

For cybersecurity specialists, IT administrators, and business leaders, understanding how the Fn key works can improve both productivity and security.

What Is the Fn Key?

The Fn key stands for Function key, introduced primarily on laptops to conserve keyboard space. Rather than including dedicated ...