Sony PCG-R505JLK - Manual (Page 78)

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Selecting the Display Mode
This notebook uses the Intel® video controller, which enables you to select the
desired display when the notebook is connected to an external monitor. When
you connect an external display, you can switch the display mode between your
notebook’s LCD display and the external monitor.
To select the display mode, proceed as follows: (See also the “Connecting an
External Display” section.)
1 Click the Start button, point to Settings, then click Control Panel. The
Control Panel appears.
2 Double-click Display to access the Display Properties window.