HP Notebook Series Hardware Manual page 23

Component
1
Fn key
2
Function keys (11)*
3
Keypad keys (15)
*For more information, refer to the
Chapter 2, "TouchPad and Keyboard."
Hardware Guide
Description
Combines with the function keys to
perform additional system and
application tasks. For example,
pressing Fn+F8 increases screen
brightness.
Perform system and application tasks.
When combined with the Fn key,
function keys F1 through F12 perform
additional tasks as hotkeys. (The
F2 function key is not used.)
Can be used like the keys on an
external numeric keypad.
"Hotkey Quick Reference"
Hardware Components
section in
1–15