By default, screenshots are pretty big on a retina display on an El Capitan machine. Like about 4 times the size they should be. I haven’t found a defaults key I can use yet to reduce them, so I’ve been using this little screenshotting app called RetinaCapture, available at https://gumroad.com/l/retinacapture. Basically, when you’re running it, you just open it up and click on the Window button. There, you can select a window to screenshot. Once you’ve selected the window, you’ll be prompted to save it somewhere with a name. I don’t love having to use any 3rd party apps for my screenshotting workflow. Screens get resized for books and so I’m…