Dell Inspiron 3800 System Reference Manual page 34

Using the Computer: Dell Inspiron 3800 System Reference
2. Connect the external monitor, TV, or projector to the computer.
3. Turn your computer on.
4. Click the Start button, point to Settings, and then click Control Panel.
5. Double-click the Display icon, and then click the Settings tab.
6. Change the Colors option to High Color (16 bit) or True Color (24 bit).
7. Click on the picture of Monitor 2.
The Monitor # 2 dialog box appears. It asks if you want to activate Monitor 2.
8. Click Yes.
9. Adjust the Screen Area to the desired resolution to be displayed on your external monitor.
10. Change the Colors option to High Color (16 bit) or True Color (24 bit).
11. Drag the picture of Monitor 2 to match the physical position of the external monitor relative to your computer's display.
For example, if the external monitor is located physically above your computer's display, drag the Monitor 2 picture to place it above the Monitor 1
picture.
12. Verify that the Extend my Windows desktop to this monitor check box is checked.
If it is not checked, click on the check box to check it.
13. Click Apply.
14. Click OK.
15. Click Yes.
16. Click OK to close the Display Properties dialog box.
NOTE: True Simul-mode (the ability to simultaneously display video of the same content and resolution on both the computer display
screen and the external monitor) is not supported if the computer is booted to MS-DOS, using a full-screen MS-DOS session under a
Microsoft Windows operating system, or the ATI Mobility M1 video driver is not loaded. This limitation may also be noted in operating
systems other than Microsoft Windows.
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