Displaying all MicroStation files

MicroStation permits DGN files to be saved without a file extension or with an extension of any length. The following steps configure ArcGIS to examine all files for the DGN format and display them when navigating in the Catalog window.

Steps:

1. Start ArcMap or ArcCatalog.
2. Click Customize in the main menu and click ArcCatalog Options or ArcMap Options.
3. Click the CAD tab.
4. Check the box Examine all file extensions to display all DGN files. Uncheck it to display only DGN files saved with the extension .dgn.
5. Click OK to close the dialog box.