1. The dual window feature provides split-screen functionality, which allows you to use two applications at the same time.
   
2. To use dual window, press the Dual window key.
   
3. Tap the desired app.
   
4. Tap the desired second app.
   
5. Touch and drag the Blue tab to resize the windows.
   
6. The blue outline indicates which window is active.
   
7. To access Dual window options, tap the Blue tab.
   
8. Tap the Swap icon to switch the top and bottom window.
   
9. Tap the Apps icon to view a list of apps.
   
10. Tap the Maximize icon to enlarge the active window to the full size of the screen.
    
11. Tap the Close icon to close the active window.