Use the following procedure to move an in-place massing family from the project environment to the conceptual design environment.
Open a project.
Click Model tabConceptual Mass panel (Create Mass). The conceptual design environment opens.
(Optional) Create a form or manipulate the mass in some way using the available tools. See Forms.
Click Modify | Form Element tabIn-Place Editor panel Finish Mass. The mass moves back to the project environment. Or you can double-click in a blank area of the view to finish.