How to Relive your Memories
1 Magic moments
In your Photos library, click Memories and then Get Started. Photos will get to work gathering your images into groups it thinks belong together. It’ll automatically name the memories using metadata and tags from the images it’s aggregated.
2 Stylise your memories
Everything is auto-generated by Photos, so you only have rudimentary choices over the visual theme and music. There are seven choices of theme, but on the Music tab you can pick anything from your iTunes library for a more personal feel.