This could be a post in Graphics , but really it's about working in a Finder window because I use a folder for images rather than iPhoto . All I want to do is look at an open folder of images , scroll through them and add a little red dot next to the ones I like. That's it , a removable mark that could accompany any kind of file in the Finder window. Is there a piece of software out there that will do this? It sounds simple enough but I can't find anything.