Keychron K3 Benutzerhandbuch Seite 6

For RGB version – Press fn + right arrow / left arrow to change color
or
4. Switch between function and multimedia keys (F1-
F12)
For Windows: Press fn + X + L (for 4 seconds) to switch.
Multimedia keys
Function keys
For Mac: Go to system settings > Keyboard > and enable the function keys.
*For F5 & F6 as function keys press fn + K + C (for 4 seconds) and use same shortcut to
switch.
Enable the function keys
Settings Keyboard
6