Compaq Armada 7400 Reference Manual page 37

The pointing device performs the same basic operation as a
mouse. The EasyPoint III senses finger movement; the device
itself does not move.
To operate the pointing device:
1. Place your index finger on top of the pointing device
2. Push in the direction you want the cursor to move on the
display.
3. Click the left
thumb.
or right pointing device button with your
.