Zte Z557BL User Manual page 139


Navigation key light duration: This feature lets you control
the backlight of the touch keys (the Home key, the Back key,
and the Recent apps key). Choose one of the following
options to set the backlight duration.
– Always off: Turn off the touch key backlight.
– Always on: Keep the touch key backlight on while the
screen is turned on.
– 2 seconds / 5 seconds: The touch keys light up for 2 or 5
seconds each time you tap the screen or tap keys while the
screen is turned on.
– Auto: Let your phone automatically turn on/off the touch
key backlight.
Notifications
Control the display of notifications.

Tap and switch on or off On the lock screen to control
whether notifications should be displayed on the lock
screen.

Tap an app to control its notifications. You may turn off its
notifications, allow it to sound in Do not disturb mode, allow
it display notifications as a pop-up for quick view, or hide
content in lock screen. The available options are dependent
on the app.
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