Yealink SIP-T56A User Manual page 77

Tap the desired time in the pop-up dialog box.
5.
Tap to accept the change or
6.
You can also drag the backlight slider on the control center to change the intensity of the touch
screen.
To configure the backlight active level on the control center:
Swipe down from the top of the screen to enter the control center.
1.
You can do one of the following:
2.
Drag the backlight slider.
-
to cancel.
Customizing Your Phone
77