To play and edit the Memories prepared for you in iOS 12:
1. Tap the Photos app from the Home screen.
2. Tap For You on the menu bar at the bottom of the screen to access your curated memories. You will see numerous slideshows created for you.
3. Tap one of the Memories that Apple has already created for you. The Main Menu of this particular Memory displays.
4. Press the Play icon on the slideshow. The screen displays a downloading icon, and then once it has downloaded, the Memory will play.
5. To make changes, tap the screen, and then press the Pause button at the bottom to pause the show. You are now in the Pause mode screen.
6. Next, tap Edit at the top. You will see the following:
Title – Tap this selection to change your title on the first slide.
Music – Tap this selection to change the music.
Duration – Tap this selection to change the length of the film.
Photos & Videos – Tap this selection to add or remove photos.
7. Tap Done when you have made adjustments. You will arrive back in the Pause mode screen where you can either press the Play button, the Back (<) blue link at the top, or the Home button to exit (on iPads/iPhone 8/8 Plus iPhones & earlier) or swipe up from the base (on iPhone X models).
Learn more about memories, including how to create your own and save it as a video to sharek, plus 100+ more tricks! “100+ iPhone/iPad Tricks You Can Do Right Now!” is available on this site at a holiday price, or you can purchase it at Amazon.com, Barnes & Noble, and more.