HP F768WM - Manual (Page 14)

3 Using the keypads
The computer has an embedded numeric keypad and also supports an optional external numeric keypad
or an optional external keyboard that includes a numeric keypad.
Component Description
(1) fn key Executes frequently used system functions when pressed in
combination with a function key or the
esc key.
(2) Num lock light On: Num lock is on.
(3) num lk key Enables the embedded numeric keypad when pressed in
combination with the
fn key.
(4) Embedded numeric keypad Can be used like the keys on an external numeric keypad.
8 Chapter 3 Using the keypads