To Use The Touchpad - HP Compaq Presario,Presario 2100 Reference Manual

Basic Operation
Operating Your Notebook

To use the TouchPad

The TouchPad includes an on-off button so you can turn off the TouchPad to avoid
moving the pointer accidentally when you are typing. The indicator light turns off
when you turn off the TouchPad.
1 Select buttons. The Select buttons work like the left and
right buttons on a standard mouse.
2 TouchPad (touch-sensitive pointing device).
3 TouchPad on-off button and indicator light.
4 Scroll pad. The scroll pad scrolls vertically to display the
contents of the active window.
18 Reference Guide