Elitegroup A900 (V2.1) - Manual (Page 73)

This define the two status of Single , Mirror and Multi Monitor
(when an external monitor is connected to your DeskNote
computer).
When the "Single" is selected, the display can only be seen
on the DeskNote LCD panel.
When the "Mirror" is selected, you can toggle between the
LCD and CRT display. Both the LCD and CRT screen
display the same image.
Display Combination
This applies to the display that you prefer to use. The options are
VGA1 and LCD2.
Reminder: The "Auto" tab will serve as additional function of
the "Mirror" and "VGA1" respectively by removing the check
mark under the "Display Combination" selection field.
Select the "VGA1" if you want the picture to only display
on the monitor screen.
Select "LCD2" if you want the picture to only display on the
DeskNote screen.
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