This chapter covers the rationale of and standard procedure for producing a cephalometric superimposition. This method uses the Ethmoid Triad for the overall superimposition, the internal structures of the palate and key ridges for the maxillary superimposition, and the internal structures of the mandibular symphysis and the lower border of the third molar follicle for the mandibular superimposition. This method gives the learner a foundation for understanding and interpreting the results of the superimposition.