Function Key Lock -

Press Fn + Esc (most common). Check for a light on the Fn or Esc key to confirm status.

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 function key lock

No lock key? Go to BIOS or your laptop’s keyboard manager. Press Fn + Esc (most common)

Look for a section labeled "Post Behavior," "System Configuration," or "Keyboard." " "System Configuration

A: Many Logitech, Corsair, and mechanical keyboards have a dedicated Fn Lock key or software toggle.