When you want to move layers in Photoshop, there are a few things you need to know. First, the layer mask is a tool that lets you select only the areas of a layer that you want to change. Second, the layer palette lets you choose which colors to use for each layer. Finally, if you want to move a layer around in your document, there are three ways: by dragging it around, by pressing and holding down the shift key while dragging, or by using the Move tool.