Import a DGN file stored in a vault into the current Revit project.
Click Import from Vault on the Revit Vault Ribbon.
Select the DGN file to be imported from Vault.
Click the Import button.
If you import a DGN file that has more than one model, the Select Design Model dialog displays.
Select a design model from the DGN file and click OK to finish importing the file based on your position selection.