Pace Layers show how parts of IXD change at different speeds. Content, front end code, interaction specs, interaction patterns, and visual design will change from slowest to fastest in that order. The faster parts will be easier to change and innovate. Visual design trends change often, and many companies will want to keep their visual design up to date and trendy. The faster layers are easier to change. The slower layers are important to keep stability and sustainability. They change very slowly. For example, user interactions should be intuitive and consistent. Overall, the different elements make user experiences both consistent and adaptable to user needs.