The minute flashes and the short key changes the value. Then press the long key to enter the automatic brightness function switch setting, display AL:x, and press the short key to change the value. AL:0 is off, AL:1 is on, when AL:1, the display automatically changes to level 1 brightness after 19:00 in the evening, and automatically changes to the brightness value in the Ld setting after 7:00 in the morning.
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