The retina display confuses me. If I open an image in Photoshop, then it opens at what I presume is the correct dimension-size. But if I open that same image in Preview, then it displays tiny. And if I insert it into an email, then it is tiny too. Which confuses me because I'm often not sure how the recipient receives it, and have to log into iCloud to view Sent messages just to see the size of the embedded image. I know that the retina does scaling stuff to images, but viewing images across various apps shouldn't have to be a mind***k. Is there a way to standardise the scaling of images when viewing them?