Dell Latitude D630 ATG (Mid 2007) - Manual (Page 48)

48 Using the Display
9 If prompted, click Yes to keep the settings.
10 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.
Swapping Primary and Secondary Displays
To swap your primary and secondary display designations (for example, to use your external monitor as
your primary display after docking):
1 Click the Start button and click Control Panel.
2 Under Pick a category, click Appearance and Themes.
3 Under Pick a task..., click the area you want to change, or under or pick a Control Panel icon, click
Display.
4 Click the Settings tab→ Advanced→ Displays tab.
See the documentation that came with your video card for additional information.