You can create, modify, rename, or delete mapping translations to control how properties are translated between DGN and DWG files. 
 Create a DGN Mapping Setup
- At the Command prompt, enter DGNMAPPING. The DGN Mapping Setups dialog box displays. 
- Click New. The New Mapping Setup dialog box is displayed. 
- Under New DGN mapping setup name, enter a mapping setup name. 
- Under Based On, select an existing mapping setup. 
- Select a mapping type. 
- Click Continue. The Modify DGN Mapping Setup dialog box displays. 
- Select each tab, inspect the property mappings, and edit them if necessary. 
 Modify a DGN Mapping Setup 
- At the Command prompt, enter DGNMAPPING. 
- In the DGN Mapping Setups dialog box, select the mapping setup to modify. Note:  You cannot modify the Standard mapping setup.  
- Click Modify. The Modify DGN Mapping Setup dialog box is displayed. 
- Select the tab containing the property mapping to change. 
- Locate the row corresponding to the property mapping and make the required change. 
 Delete a DGN Mapping Setup
- At the Command prompt, enter DGNMAPPING. 
- In the DGN Mapping Setups dialog box, select the mapping setup to delete. Note:  You cannot modify the Standard mapping setup.  
- Click Delete. 
- When the Delete Mapping Setup prompt is displayed, click Yes. 
 Rename a DGN Mapping Setup
- At the Command prompt, enter DGNMAPPING. 
- In the DGN Mapping Setups dialog box, select the mapping setup to rename. Note:  You cannot modify the Standard mapping setup.  
- Click Rename. 
- Enter new mapping setup name. 
- Click anywhere outside the text box. 
 Add Properties from a DWG File
- At the Command prompt, enter DGNMAPPING. 
- In the DGN Mapping Setups dialog box, select the mapping setup to modify. Note:  You cannot modify the Standard mapping setup.  
- In the Modify DGN Mapping Setup dialog box, click Add Properties from Drawing File. The Add Properties from Drawing File dialog box is displayed. 
-  Select a drawing file and click Open. The unique properties of the file are added to the bottom of the DWG column for each tab.  
 Add Properties from a DGN File
- At the Command prompt, enter DGNMAPPING. 
- In the DGN Mapping Setups dialog box, select the mapping setup to modify. Note:  You cannot modify the Standard mapping setup.  
- In the Modify DGN Mapping Setup dialog box, click Add Properties from DGN File button. 
- The Add Properties from DGN File dialog box is displayed. Select a DGN file and click Open. The unique properties of the file are added to the bottom of the DGN column for each tab.