If you want to merge layers in Photoshop, there are a few things you need to know. First, the layer mask is a helpful tool that can help you keep track of which layer is being used for which part of the image. Second, Photoshop has a feature called “merging modes,” which can help you combine different layers into one. Finally, be sure to save your work as a PNG or JPEG file so that you can easily access it later.