How to use the Samsung Galaxy smartphone Fingerprint scanner lock screen feature

Fingerprint scanner
Use fingerprint recognition as an alternative to entering passwords in certain apps.
You can also use your fingerprint to verify your identity when logging in to your
Samsung account. To use your fingerprint to unlock your device, you must set a
pattern, PIN, or password.

1. From Settings, tap Security and privacy > Screen lock and biometrics >
   Fingerprints.
2. Follow the prompts to register your fingerprint

Fingerprint management
Add, delete, and rename fingerprints.
◌ From Settings, tap Security and privacy > Screen lock and biometrics >
Fingerprints for the following options:

• The list of registered fingerprints is at the top of this list. You can tap a
  fingerprint to remove or rename it.
• Add fingerprint: Follow the prompts to register another fingerprint.
• Check added fingerprints: Scan your fingerprint to check if it has been
  registered.

Fingerprint verification settings
Use fingerprint recognition to verify your identity in supported apps and actions.
◌ From Settings, tap Security and privacy > Screen lock and biometrics >
Fingerprints.

• Fingerprint unlock: Use your fingerprint for identification when unlocking your
  device.
• Fingerprint always on: Scan your fingerprint even when the screen is off.
• Show icon when screen is off: Show the fingerprint icon when the screen
  is off.
• Show animation when unlocking: Show an animation when you use
  fingerprint verification.
• About fingerprints: Learn additional information about securing your device
  with fingerprints.