Strangely, the Always On feature doesn’t come enabled straight out of the box, but thankfully, it’s super easy to activate. All you have to do is head into Settings, followed by Display, then tap Always On Display and slide the toggle from Off to On. The next time you lock your device, you will notice that the display will fade to a black background, but a small portion will remain illuminated exhibiting either a clock, calendar or image.
You do, of course, have the option to choose what’s displayed on the screen of your device. The choices are fairly restricted, though. You only have the resources to alter the clock style and background image. If you’d like to have a play around with the options, hit the button entitled Content to Show while in the Always On Display menu.