On most modern Dell laptops, the easiest way to toggle the Fn Lock is: simultaneously. How it works :
On most Dell laptops and wireless keyboards, the fastest way to switch the function lock on or off is via a keyboard shortcut: Press the Fn + Esc keys simultaneously.
The acts like a "Caps Lock" for these keys. It allows you to toggle between these two modes so you don't have to hold the Fn key down constantly. dell function lock
Dell Latitude 14 Rugged Extreme – 7414 Getting Started Guide
When (Dell’s default on many newer models), the icons rule . Pressing F1 alone will mute the speaker. To use the traditional F1 software command, you must hold the Fn key + F1 . On most modern Dell laptops, the easiest way
When , the traditional functions rule . Pressing F1 alone sends the standard F1 command. To mute the speaker, you must hold Fn key + F1 .
Look at your top row of keys ( F1 – F12 ). Find the key that has a small padlock icon with the letters inside or next to it. This is most often located on the Esc (Escape) key, but sometimes on the F9 or F12 key. It allows you to toggle between these two
(Note: On some older Dell models, the Fn Lock key might be located on the F10 or F11 key instead of Esc. Look for the padlock icon.)
The Function Lock (often labeled or FnLk ) is a toggle setting that reverses the default behavior of the F1 – F12 keys.
The method depends on your Dell model, but it is almost always quick and does not require entering the BIOS.