Add a watermark to your photos. Do you have photos you would like to watermark with an logo or other graphic? Are you concerned about people stealing the images you upload to social media? PhotoMark may be the tool you need. You can add a watermark to any photo or screenshot in the Photos app. *The image or graphic for your watermark needs to be located in the Files app. *Your watermarked photos are saved in the Photomark album in the Photos app.