Some photos or albums I have posted on-line (on Facebook etc) have been shared, thus crediting me as the photographer. But recently some have been "stolen" and appeared elsewhere under the name of someone else. It has not been a big deal, but I would prefer be acknowledged…. or at least a thank you would be appreciated. Therefore, I would like to know how to watermark my work, but have not been able to find out how to do it. I don't have any fancy photography app, just iPhoto.