You can create masses within a project (in-place masses) or outside a project (loadable mass families). In-place masses are used for mass forms that are unique to a project. Loadable mass families are typically used when you will be placing multiple instances of the mass in a project, or when you will use mass families in multiple projects. To create in-place masses and loadable mass families, use the conceptual design environment. To learn more visit https://www.cadcim.com/