Using Keypads; Using The Embedded Numeric Keypad - HP Compaq Series Hardware Manual

Using Keypads

The notebook has an embedded numeric keypad and also
supports an optional external keypad or an optional external
keyboard that includes a numeric keypad.

Using the Embedded Numeric Keypad

The 15 keys of the embedded numeric keypad can be used like
the keys on an external keypad. When the embedded numeric
keypad is turned on, each key on the keypad performs the
functions indicated by the icon in the upper right corner of
the key.
Component
1
Num lock light
2
fn key
3
num lk key
4
Embedded numeric keypad
Hardware Guide
Pointing Devices and Keyboard
2–8