As well as creating references to models, you can import a model from another DGN file into the open DGN file. In this case, the link with the original model is cut and the imported model becomes another model in the open DGN file.

You can import models via the Import Models icon in the Models dialog, or you can drag the DGN/DWG file from Windows Explorer, or from the Models dialog in another session of MicroStation.

Additionally, you can make a copy of an existing model in the open DGN file.