LG L21G Guia Del Usuario página 27

Special Features
Knock Code
The Knock Code feature allows you to wake and unlock the screen with your own
Knock Code pattern. When enabled, Knock Code divides the screen into 4 parts and
uses your unique combination of taps to secure your device. You can disable this
feature in the Lock screen settings.
To activate the Knock Code feature
1
From the Home screen, tap
> Select screen lock > Knock Code.
2 Follow the on-screen steps to set your Knock Code. You have to create a Backup
PIN as a safety measure in case you forget your Knock Code.
Unlocking the screen using your Knock Code
You can wake up and unlock the screen by tapping the Knock Code, set up in the
previous section, when the screen is off.
KnockON
You can wake up, or turn off, the screen as easily as double-tapping the screen.
While the screen is off, and idle, double-tap the center of the screen quickly to wake
the screen. To turn the screen off, double-tap the Status Bar in any screen (except on
the camera viewfinder) or an empty area on the Home screen.
NOTE: When using KnockOn to wake the screen, make sure you do not
cover the proximity sensor. Doing so will prevent the screen from turning on.
This feature is designed to prevent the device from turning on inadvertently
in your pocket or storage location.
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> Apps tab (if necessary) > > Lock screen