Google 4 Manual Book page 207

1. Go to
> Screen lock.
2. Touch the type of lock you want and fol­
low the onscreen instructions.
To change the screen lock that's currently
set, enter the pattern, PIN, or password to ac­
cess the lock options.
You can choose among these lock options,
listed in approximate order of strength:
• Slide provides no protection, but lets
you get to the Home screen quickly, or
open Camera and start taking pictures
immediately.
• Face Unlock lets you unlock your phone
by looking at it. This is the least secure
lock option.
SECURITY SETTINGS
Settings > Personal > Security
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