| Key Combo | Function | |-----------|----------| | Fn + F1 | Sleep | | Fn + F2 | Toggle wireless (Wi-Fi/Bluetooth) | | Fn + F3 | Disable touchpad | | Fn + F4 | Decrease volume | | Fn + F5 | Increase volume | | Fn + F6 | Mute microphone | | Fn + F7 | Decrease brightness | | Fn + F8 | Increase brightness | | Fn + F9 | Display toggle (Laptop only / Duplicate / Extend / Second screen only) | | Fn + F10 | Print Screen | | Fn + F11 | Home | | Fn + F12 | End | | Fn + Esc | (explained below) | | Fn + ↑ / ↓ | Page Up / Page Down | | Fn + ← / → | Home / End | Fn Lock (Fn + Esc) One of the most useful Dell features is Fn Lock . Press Fn + Esc to toggle the lock on or off. When Fn Lock is on , the F1–F12 keys act as standard function keys (F1, F2, etc.) by default. To use the special actions (brightness, volume), you then press Fn + that key .
The Fn key on Dell laptops is a small but powerful tool that makes laptop keyboards versatile. Once you understand Fn Lock and the common shortcuts, you can control brightness, volume, and system settings instantly—without hunting through menus. fn key on dell laptop