Dell Latitude C540 - Manual (Page 26)

To move the cursor, lightly slide your finger over the smooth sensor area.
To select an object, lightly tap once on the surface of the touch pad or use your thumb to press the left
touch pad button.
To select and move (or drag) an object, position the cursor on the object and tap down-up-down on
the touch pad. On the second down motion, leave your finger on the touch pad and move the selected
object by sliding your finger across the surface.
To double-click an object, position the cursor on the object and then tap twice on the touch pad or use
your thumb to press the left touch pad button twice.
Track Stick
The track stick detects the pressure and movement of your finger to allow you to move the cursor on the
display. Use the track stick and track stick buttons as you would use a mouse.