I am new to photoshop. I have a sequence of a friend who is triple jumping. I have about 8 or 9 pictures from the time he starts running down the runway until he jumps and lands in the sand. What i want to do is stitch them all together so its one picture with 9 images of him in the different stages of his jump. I know how to do the necessary layering and cropping to make this. However, my problem is that I can't continue to make the final picture wider to fit in all the stages of his jump. The final picture is only as large as the original image. How can I continue to add more pictures and make the image wider?