Mechanical 16 – Bottom Layer Courtyard and Assembly Information.Mechanical 15 – Top Layer Courtyard and Assembly Information.Mechanical 14 – Bottom Layer Component Body Information (3D models and mechanical outlines).Mechanical 13 – Top Layer Component Body Information (3D models and mechanical outlines).Mechanical 12 – Bottom Layer Dimensions.Mechanical 2 – PCB Info (manfacturing info, added as text).Mechanical 1 – Board Outline (along with the Keep-Out Layer, but that can be used for other things also).6 Supplier part data automatically in schematic.4.10.4 Quickly change via or trace size.4.10.3 Adding via and changing layer automatically.