I have created a PDF file using the MicroStation PDF printer driver. Unfortunately I have lost the design file which was used to create the PDF file. How do I convert the .PDF file back to the DGN format?
MicroStation does not offer a direct file converter to go from PDF to DGN format. However in MicroStation XM (08.09.04.51) or later you can attach the PDF file using Raster Manager and manipulate as necessary.
If you need to convert the file directly to the .dgn format, there are third party programs available that can do this for you.