Currently, I write the name of my website across my photos to "watermark" my JPGs, not my favorite thing to do, but it sorta works. However, I came across this software for adding invisible watermarks and was wondering if anyone had any thoughts about it, whether there were better alternatives to this, something for the Mac (it's PC only, although I do use both Macs and PCs), whether it's effective, what your collective thoughts were on watermarking, that kind of thing. http://www.watermarker.com/software-for-adding-invisible-watermarks/ And no, I don't work for this company or date the owner's daughter. Thank you!!!