There are a few ways to arrange pictures on a couch, depending on the look you're going for. One way is to create a grid with all of the pictures, spacing them out evenly. Another way is to cluster a few pictures together and then spacing them out from the rest. You could also create a asymmetrical arrangement, with some pictures clustered together and others spaced out evenly.
If you're hanging the pictures on the wall above the couch, you'll want to make sure they're evenly spaced and at the same height. You could also create a gallery wall, which is a collection of pictures hung at different heights and depths to create an interesting arrangement.
