Sony PCG-8491 manual Using Your Notebook Computer, Using the Touchpad, Press the left button twice

Using Your Notebook Computer	n N 40
Using the Touchpad

Sony Notebook Computer User Guide

Double-	Press the left button twice.
click
Right-click	Press the right button once. In many applications, this action displays
	a shortcut menu of context-sensitive choices.
Drag	Slide one finger while pressing the left button.
Scroll	Move your finger along the right edge of the touchpad to scroll
	vertically. Move your finger along the bottom to scroll horizontally.
	(The scroll function is available only with applications that support a
	touchpad scroll feature.)