Set the Cover Image for My Collection?

You can do this in Loupe view, or from Grid view (seen above). Just tap-and-hold on 15the image you want to appear as the cover of your collection (the thumbnail you see when you look at all your collections on the main screen, like you see in the phone, also shown above). A pop-up menu will appear where you’ll choose Set as Cover (as shown marked above in red), and now that image will appear as the cover for your collection.