Use the backlight brightness level feature to adjust the LCD backlight intensity. At Level 0 the backlight is off. Level 10 is the brightest backlight setting and the system default. The selected backlight brightness level is applied to the LCD during normal operation. When you enter the programming menus to set up the control or press any key, the LCD automatically displays the brightest level. If you do not press a key for 30 seconds, the main screen displays and the backlight setting reverts to the selected brightness level.