When learning Photoshop, teachers in school usually start with the tool window, so everyone's concept of this toolbar is fixed and unchanging. In fact, this interface is variable. For example, the Content-Aware Move tool, which is often used by me, is hidden in the Healing tool. Every time it is used, it has to be opened, which is very troublesome. But with this tutorial setting, you can switch tools faster and greatly increase work efficiency.