If you are hanging one photo or a whole wall full the easiest way to do this is to cut paper to the size of each frame. Then, using painter’s tape to secure, place where you would like them to go. This way you can rearrange to see how it will look. When you’re ready to hang, dab a bit of toothpaste on the hook on the back of the frame. Gently press onto the paper. This will show you where to hammer in the nail. When the nail is in place, remove the paper and hang your photo.