Lock Instantly With Power Key; Vibrate On Screen Tap - Samsung Galaxy S III User Manual

Using a Visible Pattern
When the Make pattern visible option is enabled, the device displays
the on-screen lock grid that is used for unlocking.
Note: This option only appears when a screen lock option is active.
Locking Automatically
This option allows you to define the amount of time that must pass
before the device can automatically lock on its own.
Note: This option only appears when a screen lock option is active.

Lock Instantly with Power Key

When enabled, the screen is automatically locked after pressing the
Power/Lock key.
Note: This option only appears when a screen lock option is active.

Vibrate on Screen Tap

When enabled, you will feel vibration as feedback while drawing the
pattern, using a PIN or password lock.
Note: This option only appears when a screen lock option is active.
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