Spreads constructed with three layers corresponding to the three tonal levels of the project: safe, risky, and breakable. These spreads operate through varying degrees of rule, positioning the most stable condition at the surface and underlying layers progressing toward greater rule-breaking. This interaction allows readers to observe how small modifications can shift a design decision. In certain instances, the layered system shifts from a vertical hierarchy to a lateral arrangement, bringing all possible states into view all at once.