Sony PCG-X18 - Manual (Page 37)

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Customizing Your Notebook Computer
Selecting the Display mode
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1 Click Details in step 6 of "Selecting a Display".
The Advanced Settings window appears.
2 Select the display type.
External display device:
Set the refresh rate/resolution (for Independent display/Timing)
Setting Function
CRT Connection to an external computer display.
Projector Connection to a projector.


You cannot select Independent
Display Timing when the display is
set to True Color (24 bit).