Learn how to create a watermark to protect your photos with this Photoshop Tutorial. Quick & easily create a transparent watermark to use over and over again. Tutorial complete with step-by-step instructions.
Create a Signature Watermark in Photoshop Elements
I haven't checked the actual web-site as I don't use Photoshop, but I love the effect and can see me using this myself. Where I pinned it from said "How to Create a "Double Exposure" in Photoshop — Daily Epiphanie"