iPhone Photos Captions

JennaPhoenix wrote:… Am I understanding this correctly that by doing this and then search for Cats, all photos with that caption should show up?

Almost. The limitation is that Photos seems to start scanning at the beginning of captions, and if it doesn't find what it's looking for, it doesn't get included. So, if the caption is "Cat named Clyde" then it would be found in a search for "Cat." But if the caption is "Clyde the Cat" then the search will not see "Cat."

On the other hand, "Cat" is a category that Photos recognizes, so if it sees a cat in the picture, independent of the caption, Photos will include the picture in a search for "Cat." That means, if "Clyde the Cat" is obviously a cat, then the picture would show up with a search for Clyde or in a search for Cat.