This document provides instructions for using Photoshop to add a shadow to an image. It describes selecting the person from the original photo and placing them on their own layer. It then instructs selecting an image to use for the shadow, filling it with black, and dragging it below the person's layer. The shadow is then resized, blurred with Gaussian Blur to soften edges, and opacity lowered to reduce intensity. When completed, these steps allow adding a realistic shadow behind the person in the photo.