HP ProBook 4446s Notebook-PC - Manual (Page 41)

Using an optional external numeric keypad
Keys on most external numeric keypads function differently according to whether num lock is on or
off. (Num lock is turned off at the factory.) For example:
● When num lock is on, most keypad keys type numbers.
● When num lock is off, most keypad keys function like the arrow, page up, or page down keys.
To turn num lock on or off on an external keypad as you work:
▲ Press the num lk key on the external keypad, not on the computer.
Using the keyboard 31