Bottom - Sony PCG-XG18 Primary User Manual

The keyboard contains a cursor-pointing device called a touchpad. You
can point to, select, drag, and scroll objects on the screen using the built-in
touchpad.
Point Slide one finger on the touchpad to place the pointer on an item
or object.
Click Press the left button once.
Double-click Press the left button twice.
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.)