Extended Display means you work with a larger Mac desktop area spanning your computer monitor and your Artisul LCD Display. Applications can be moved from one display to the other, and will allow you to work in different screen resolutions.
How to Change to Extended Display
1.Open System Preference > Display > Arrangement
2. Make sure "Mirroring Display" is unchecked.
3. To set the Artisul tablet as your main monitor, click on the white bar above the blue box representing your computer's monitor. Drag it over to the other blue box representing the Artisul tablet.