As Instagram was developing this app, it found that most of the collages on its service were of people, usually of family and friends. So aside from creating collages from just your recent images, Layout also has a Faces tab that'll surface the photos in your camera roll that have faces in them -- it uses Apple's iOS SDK for face detection to do this. As you pick the different photos with faces, the app is then smart enough to center the face in the frame.
Last but not least, the Layout app comes with a Photo Booth feature that lets you take four selfies in quick succession. You could stay still the whole time, of course, but the idea is to move the phone around in between each shot in order to capture unique angles for the collage. Once you're satisfied with your collage creation and you hit Save, you'll then be prompted to either send it to Instagram, Facebook or another supported iOS app.
Keen to show off the creative potential of Layout, the Instagram team created a slew of collages using the app that demonstrate all the cool things you can do with it. You can check them out in the gallery above, and if you feel like creating your own, you can go ahead and download it starting today.