Sony PCG-GRX690P - Manual (Page 142)

VAIO Computer Quick Start
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4 Click the selection tab located just above the display graphic to activate the
display panel.
5 Click the Primary icon or Secondary icon on the panel of your
display choice to change the display settings.
6 Click Apply. For more information, click Help.
Mobility Radeon Properties window
✍
If you cannot see your movie or DVD on the external display, change the monitor or TV
setting by clicking the Primary icon
on the display panel of your choice.
✍
You may not be able to display the computer screen (LCD) and an external display or
projector at the same time, depending on the types of computer displays and
projectors you are using.
Turn on the computer after you connect the external display.