Are there any good app examples of what Frank says here? "A step-by-step sequence should be contained in a modal overlay for presentation to emphasize that the

Are there any good app examples of what Frank says here? "A step-by-step sequence should be contained in a modal overlay for presentation to emphasize that the Back button in this context serves a different purpose than in a hierarchical drill-down. The step-by-step process is usually completed with a Done or Close button, which also closes the containing modal. The sequence can have a variable number of steps and different paths depending on the options selected."