If your function keys aren't behaving as expected, try these quick fixes: How to Use and Lock the Fn Key on Your Keyboard | Logitech
keys has become a bit of a battleground. On one side, you have professional software users who rely on these keys for essential shortcuts; on the other, you have casual users who just want a quick way to mute their volume or dim their screen. function key lock
High-end external keyboards may have a physical "Fn Lock" button, sometimes indicated by a small LED light. If your function keys aren't behaving as expected,
A: Usually, yes on laptops. Some require BIOS setting to make it permanent. on the other