The Method Controls and Element Order Settings allow you to specify whether the mesh to be generated for a given body is Quadratic (high order) or Linear (low order). Mixed Order Meshing refers to meshing a multibody part having shared topology with some bodies as Quadratic and some bodies as Linear. In such situations, "transitional elements" are required to connect the mesh at any linear-to-quadratic interface. These "transitional elements" are treated as quadratic elements with dropped midside nodes, and the side of the interface on which they appear is determined by your meshing process. Mixed Order Meshing is not supported for Axisymmetric Sweep. See Method Controls and Element Order Settings for more information.