Hi. I am a new Mac user (had my macbook for 2 weeks, loving it, but still learning how to use it). I am really annoyed by Preview app. Anytime I save a photo in my Download folder, it automatically opens it with Preview, whether I want it or not. When I quit Preview, it still opens the next time I download a photo. I can't find anywhere in Preview options such option to disconnect automatic opening of photos. How do I turn it off please?