Dell: Fn Key

Some curse it— accidentally swapping F4 for airplane mode mid-spreadsheet. Others praise its quiet power: one finger, one bridge, one modifier standing between you and the BIOS.

: Toggles the Fn Lock , switching the primary and secondary behaviors of the F-row. Fn + F1 : Mute/unmute system audio. Fn + F2/F3 : Decrease or increase volume. dell fn key

: Toggle keyboard backlighting (on supported models). Fn + F6/F7 : Decrease or increase screen brightness. Some curse it— accidentally swapping F4 for airplane

You can actually physically reverse this logic at the hardware level without installing any software. You can make the F-keys behave like standard F-keys (great for coding or gaming) and force the multimedia icons (Volume, Brightness) to require the Fn key combination instead. dell fn key