Extended Desktop Dual Display
1.Select Multiple Displays.
2.From the Operating Mode drop-down menu select Extended Desktop.
3.Select PrimaryDevice: Monitor or Digital Display. (This display has the Start button and Taskbar)
4.Select SecondaryDevice: Digital Display or Monitor. (This display is the desktop extension)
You can re-position the displays as desired by dragging the 1 or 2 icons in the Position box.
5.Select Apply.
6.Select OK within 15 seconds to accept the new settings.
6. Select OK to close the Control Panel.