See also:

How to use the back button
Push the BACK button to return to the previous screen. ...

Troubleshooting guide
The system should respond correctly to all voice commands without difficulty. If problems are encountered, try the following solutions. Where the solutions are listed by number, try each soluti ...

Off button
To change the display brightness, press the OFF button. Pressing the button again will change the display to the day or the night display. The brightness can then be adjusted using the NI ...