I really love the feature to identify people in photos from events and activities, but I've seen many times where the top left corner of the photo is identified as "Person A". And "Person B". And "hayes". ;) (miss ya, man!)

When you Add a Nametag to a photo, a frame appears on the picture. This frame is both movable and resizable. So you can place it directly over the person whom you're trying to tag.

You can also remove a Nametag and recreate it, if you make a mistake with the placement, size or you just label the wrong person. Or if the person whom you labeled says "Please un-label me."

FWIW