To stop playing a slideshow, press the Escape key.
When a memory hits home, you can mark it as a favorite.
Click Memories in the sidebar.
Double-click a memory to view its photos.
Scroll to the bottom of the memory and click Add to Favorite Memories.
Memories you mark as favorites appear in Favorite Memories.
Click Favorite Memories in the toolbar.
You can create your own memories to highlight a moment or collection that’s meaningful to you.
Click Photos in the sidebar.
Click the title of the moment or collection to open it.
Scroll down to the bottom of the photos, then click Add to Memories.
Click an album in the sidebar.
Click Show as Memory.
Scroll down and click Add to Memories.
You can block specific types of memories whose content you don’t want to see.
Double-click a memory that you want to block.
Scroll down and click Block Memory, choose the type of memory you want to block, then click Block.
You can reset Photos to create blocked memories again. Choose Photos > Preferences, click General, then click Reset Blocked Memories.
When you decide a memory is not for you, you can delete it.
Click a memory to select it, then press Delete.
Click Delete.
Only the memory is deleted; the photos remain in your library.