Windows Vista; Using A Monitor As Your Primary Display - Dell Inspiron 1200 Owner's Manual

7 Change Screen Area to the appropriate sizes for both displays and click
Apply.
8 If prompted to restart the computer, click Apply the new color setting
without restarting and click OK.
9 If prompted, click OK to resize your desktop.
10 If prompted, click Yes to keep the settings.
11 Click OK to close the Display Properties window.
To disable dual independent display mode:
1 Click the Settings tab in the Display Properties window.
2 Click the monitor 2 icon, uncheck the Extend my Windows desktop onto
this monitor option, and then click Apply.
If necessary, press <Fn><F8> to bring the screen image back to the
computer display.

Windows Vista™

1 Click the Windows Vista Start button
2 Under Appearance and Personalization, click Adjust screen resolution.
3 In the Display Settings window, click the monitor 2 icon, click the Extend
the desktop onto this monitor check box, and then click Apply.
4 Click OK to close the Display Settings window.
To disable extended desktop mode:
1 In the Display Settings window, click the Settings tab.
2 Click the monitor 2 icon, uncheck the Extend the desktop onto this
monitor option, and then click Apply.

Using a Monitor as Your Primary Display

To swap your primary and secondary display designations (for example, to use
your external monitor as your primary display after docking), perform the
steps in the following section that corresponds to the operating system your
computer is using.
46
Using the Display
, and click Control Panel.