When I go into the "People" album, I see several people I already added in iOS10, basically my family members. But previously there was a way to add more faces from photos to "People" by giving a name to faces that were found in photos. How do you do this in iOS11? When I go into people I can browse people I already added, and there is a way to remove or unfavorite faces, but how do I add new faces/people to the album?