I don't know when I would actually want a watermark on one of my photos but I wanted to learn how to do one. I decided to take the same picture that I added a vintage effect and add a watermark.
After after some searching I found a great website that showed me how to do this. Here is a link to the site: http://www.michelespaintshop.com/text-watermark-tutorial.php . I decided to add a waterwark that said Katie's Creations.