A watermark or signature helps identify the maker of an image or photograph. You might have seen the artist's signature on drawings and paintings. Before posting, publishing, sending, or using original pictures, you might want to add a watermark to establish your right or authority.
The watermark on an image can be text-based (your name), signature, company logo, copyright symbol ©, or something else. This tutorial shows you how to add a watermark to photos from your iPhone or iPad.