NS-Suntack Operating Manual 7Switching backlight on and off Press and hold for more than 1 second until the icon isdisplayed on the screen. If the OFF sequence starts, simply release thebutton before the sequence “3”, “2”, “1” is finished. To turn off the backlight, press and hold for more than 1 seconduntil the icon disappears from the screen.DisplayAfter switching on, the heading mode is displayed by default. Push toswitch the upper line to the timer mode and start the countdown timer.While in timer mode push to switch the upper line to the heading modeagain.The lower line is dedicated to the angle shift indicator and the secondary displayto the timer or the angle reference.Heading mode Timer modeOperations