How do I use the Fn key/F Lock key/Alternate command …
https://support.microsoft.com/en-us/topic/how-do-i-use-the-fn-key-f...Use the Fn key. On keyboards with an Fn key, hold down Fn and press the key to use the alternate commands. You can also press and hold Fn while moving your finger up and down on the navigation pad to scroll within a document. You can press and hold Fn while pressing keyboard letters M, J, K, L, U, I, O, P, /, ;, and 0 to match the physical ...