Samsung Galaxy S4 User Manual page 347

1. From the main Settings page, tap My device tab
Lock screen.
2. Tap Screen lock
3. Draw your pattern by touching your first on-screen point. Then,
without removing your finger from the screen, drag your finger
over adjacent points until the gray trace line overlaps each point
and they are highlighted with a green circle.
4. When you have connected at least four dots in a vertical,
horizontal or diagonal direction, lift your finger from the screen
and tap Continue.
5. Confirm the new pattern by redrawing it and then tapping
Confirm. The Unlock pattern is set.
6. Enter the backup PIN code and tap Continue.
7. Reenter the PIN to reconfirm the previous entry and
tap OK.
Changing the Screen Lock Pattern
This feature allows you to change the previously stored unlock
pattern and update it if necessary. This process is similar to
changing your password from time to time.
1. From the main Settings page, tap My device tab
Lock screen.
2. Tap Screen lock.
3. Retrace your current pattern on the screen.
4. Tap Pattern and repeat steps 3 - 7 from the previous section.
Pattern.
Changing Your Settings 339