LG VS980 - Manual (Page 180)

178 Settings
LOCK TIME
Security lock timer: Sets the amount of time before the screen
automatically locks after the screen has timed-out.
Power button instantly locks: Checkmark to instantly lock the screen
when the Power/Lock Key is pressed. This setting overrides the
Security lock timer setting.
The Security lock settings depend on the Lock type. The following
settings may also be displayed.
Hidden pattern: Checkmark to display the unlock dot patter when (and
where) you tap the Lock screen.
Make pattern visible: Checkmark to make your pattern visible while
drawing it.
Random PIN: Sets the keypad to random numbers so that someone
watching cannot detect your PIN from your hand movements.
Improve face matching: Sets a more precise detection for face
matching.
Liveness check: Checkmark to require you to blink during face matching
detection (to guard against using a photo of you).
Gestures
This menu allows you to manage various gesture settings.
KnockON: Checkmark to enable KnockON to turn the screen on and off.
Quickly double-tap center screen to turn it on. Double-tap the Status Bar,
an empty area on the Home screen, or the Lock screen to turn the
screen off. For the best results, do not move the phone while using the
KnockON feature.
Slide Aside: Checkmark to use three-finger swipe to save running apps
to the left or bring them back to the display.
Answer Me: Checkmark to enable you to bring the phone to your ear to
automatically answer the incoming call.
Silence incoming calls: Checkmark to enable you to flip the phone to
silence incoming calls.