I don’t watermark photos. That’s because the photos that I sell are always printed on canvas anyway and I never give out the high resolution files so it’s really not a big deal for me if people grab my shots and post them all over the place. I’d love a linkback but if that’s not given, well, welcome to the Internet. So unless photography is your bread and butter I don’t see the need for you to batch watermark everything. Here’s a work-around solution to watermarking photos.