If not I could have always just opened up the Preview app and then used File/Open from in there to grab it or dragged and dropped on to it. Then I'm going to open this up in Preview which is the default app for opening up a jpg file or most image files. You could, of course, start with a jpg image already as a file but I just wanted to show that in case you are starting from there. So, I'm going to start off here in the Photos app and just drag out to the desktop a jpg image. Say you want to add a caption or watermark to a photo. On this episode let's take a look at adding captions or watermarks to images using Preview. Video Transcript: Hi, this is Gary with. Check out Adding Captions and Watermarks to Photos With Preview at YouTube for closed captioning and more options.