Part and sheet metal files now support more than one design body.

Multi-body modeling is a design method which uses more than one solid design body in a single file. In multi-body modeling, you can design many separate models in the same space and according to the same set of rules. This modeling method provides the ability to model many components of an assembly as a single part or sheet metal file. When placing a multi-body part into an assembly, the resulting multiple bodies are represented as a single entry in Assembly Pathfinder and on a bill of materials. An entire assembly could be represented as a single multi-body part. Sometimes the assembly is more important than the actual components that make up the assembly.