Sony PCG-C1VE manual Then let it go at the desired point

Using Your Notebook Computer n N 33

Sony Notebook Computer User Guide

Using the Pointing Device

Drag	Press the stick in the appropriate direction to position the pointer on
	the desired item or object. While holding the left button, press the stick,
	then let it go at the desired point.
Scroll	Press the stick while pressing the center button.

Replacing the Pointing Device cover

You can take off the cover and replace it with the additional stick cover supplied with your computer.

Attach the cover firmly.