Sony VGN-P500 Handbuch

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Using Your VAIO Computer
The pointer may move on its own in rare occasions, which does not indicate a malfunction. Leave the pointing stick untouched for a while. The pointer 
will behave normally.
The tip on the pointing stick is a consumable. You can replace it with one of the supplied spare caps when necessary.
You can disable/enable the pointing stick while a mouse is connected to your computer. To change the pointing stick settings, click StartAll Programs
VAIO Control CenterKeyboard and Mouse and Pointing Device.
!
Be sure to connect a mouse before disabling the pointing stick. If you disable the pointing stick before connecting a mouse, you will be able to use only 
the keyboard for pointer operations.
 
Action
Description
Point
Push the pointing stick to place the pointer on an item or object.
Click
Press the left button (3) or tap on the pointing stick once.
Double-click
Press the left button or tap on the pointing stick twice.
Right-click
Press the right button (5) once. In many applications, this action displays a shortcut menu.
Drag
Push the pointing stick while pressing the left button.
Scroll
Push the pointing stick up and down or sideways while pressing the center button (4). (The scroll function is available 
only with applications that support a pointing stick scroll feature.)