There are a few ways to make your face thinner in Photoshop, but the easiest way is to use the Clone Stamp tool. First, select the area of your face you want to thin down. Next, click on the Clone Stamp tool and choose a light source (a sun or a light bulb) from the options that appear. Finally, click on the area you want to clone and Photoshop will begin to clone the pixels around it. ..