1. To access Dual window, tap the Recent Apps key.
   
2. From Recent Apps, tap Dual Window.
   
3. Tap the desired apps to open.
   
4. Touch and drag the Blue divider icon to adjust the window size.
   
5. To access more options, tap the Menu icon.
   
6. To close the window, tap X.
   
7. To expand a window, tap the Expand icon.
   
8. To access the apps tray, tap the Apps icon.
   
9. To switch the windows around, tap the Rotate icon.
   
10. To turn Dual window on or off, from settings, tap the General tab, then tap the Dual window toggle to turn on or off.
    
11. To access Dual Window settings, tap Dual window.
    
12. Adjust settings as desired.