You can connect an additional monitor to your computer through the DVI
port and/or HDMI port (if available), in addition to an external monitor
connected to your computer's VGA port.
The external monitor can be configured as the main display, to mirror the
main display or for an extended Windows desktop. To configure the
displays, right-click on the Windows desktop and select Screen resolution
(Windows 7), Personalize > Display Settings (Windows Vista), or
Properties > Settings (Windows XP) and adjust the settings as required.
Alternatively, if your computer is running Windows 7, you can press the
Windows key <
Open Windows screen resolution settings.
>and <P> to configure the displays.