Samsung Galaxy Note 4 - Manual (Page 69)

Personalizing
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Pattern
Draw a pattern by connecting four dots or more, and then draw the pattern again to verify it.
Set a backup PIN to unlock the screen when you forget the pattern.
PIN
A PIN consists of numbers only. Enter at least four numbers, and then enter the password
again to verify it.
Password
A password consists of characters and numbers. Enter at least four characters including
numbers and symbols, and then enter the password again to verify it.
Fingerprint
Register your fingerprints to unlock the screen. Refer to Finger Scanner for more information.
My Places
Quickly access useful features associated with your frequently visited places by automatically
recognizing your location.