Sphereteq P-3600 - Manual (Page 70)

Chapter 5. Additional Functions
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1. Press the 'MENU' button in the bottom right-hand
corner of the unit for the 3 minutes.
2. Then,Quick menu will be displayed in the upper left-
hand corner of the window.
5.4. Quick Menu
BRIGHTNESS : Set up the brightness of the screen.
VOLUME : Volume can be set up immediately.
CALIBRATION: If the system stops moving completely
and you cannot activate any of the buttons, it could be a
screen calibration issue.
In such case, Screen calibration can be performed.