Changing the focus of a photo from one subject or area to another over a period of time. For example, in a Photoshop Elements slide show, you can set the start of a pan on one face in a photo and end the pan on another face, creating, in effect, a video from the photo. You can also zoom into or out of a photo over a period of time. For example, you can begin with a close up of one face in a photo and zoom out to view the entire photo.