If you export an XEM created in a model, it becomes available in the List of Extensions, and can be shared with other models. When you export an XEM, the original remains embedded in the model.
- Select  to open the List of Extensions.
 
- Select an extension in the list.
 
- Click the Export an Extension tool.
 
- Type a name and select a directory for the extension file.
 
- Click Save.
 
                    The extension can now be accessed by and attached to or
                        embedded in other models.