Everything happens on layers what we do in Photoshop. You can work on only one layer or merge your layers, but the professional way is to keep every element on a separate layer. This way you will always be able to change your composition. We already discussed the Layers panel and its options, but there are lots of other features in Photoshop related to using layers. In this section we are going to focus on tools that you can use on layers and how to use special layers.