If using Microsoft® Exchange / Corporate sync, some screen lock options may be unavailable.
From a Home screen, swipe up from the center of the display to access the apps screen.
Navigate: Settings > Security & location.
Tap Screen lock.
If presented with 'This device does not have a Google account associated with it...', tap Add Google account now to set up the account before proceeding. To proceed without setting up a Google account, tap Continue.
If presented, enter the current PIN/password/pattern.