Why Photos duplicates a description across a set of images

Have you had the description or title of a photo or video wind up duplicated across all the media in an album? It’s an easy thing to do by accident, judging by reader email.This was harder to do with iPhoto, where you’d need to use the Photos > Batch Change item after selecting images and videos. In Photos, it can be as simple as pressing return.With a single photo or movie selected, the Info palette (Window > Info) displays the specific metadata, like exposure time and shutter