3.The monitor displays digit number 1 is the primary monitor and number 2 is the secondary monitor.
In Windows explorer, the program is displayed on the primary monitor, if you can drag it to the secondary monitor, then Duo View mode is now working properly.
The secondary monitor has a display of 256 colours (colour depth) and 640x480 pixels (resolution) at first. The colour depth and resolution of primary/secondary monitors are separately changeable.
Changing Colour Depth and Resolution of 2nd Monitor
To change the colour depth and resolution of 2nd Monitor or TV:1.Click Start > Control Panel > Appearance and Themes.
2.Click 
icon. The Display Properties window appears.
3.Click the Settings tab. The Settings screen appears.
4.Click on the display number of the monitor you wish to change.
TV Display Resolution Limitations
You can change the Colour Depth and Resolution within the limitations of the TV. Adjust as necessary to get a good display.
5.To change the colour depth, click the arrow next to the Colour quality palette and select the available colour depth you want.
6.To change the resolution, click and drag the slider under the Screen resolution until you select the available resolution you want.
7.Click OK.
8.Follow the prompts that appear on the screen.
Using Dual View Mode 65