Samsung Galaxy S6 User Manual page 360

Setting
Secure lock settings
Fingerprints
Unknown sources
Other security settings
Access Lock Screen and Security Options
■
From home, tap Apps
 The Lock screen and security menu opens.
Settings
Description
Configure secure lock functions, such as Auto lock and Lock instantly
with the Power/Lock key. This only appears if a secure lock (Pattern,
PIN, Password, or Fingerprints) has been set.
Register your fingerprint on your phone.
Allow or deny installation of apps from sources other than the Google
Play store app.
Configure settings for encryption, password visibility, security updates,
credentials, and other security features.
> Settings > Lock screen and security .
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