How to copy Feature Definitions from one DGNLIB to another?

Ensure you are in a DGNLIB, and you can then 'Copy' the Features Definitions [red] (and Symbologies, Annotation Definitions and Groups) from another DGNLIB and 'Paste'  [green] into your current file. The example is copying the Alignment FDs.

To get the Export menu, there is a CFG variable that must be defined. I believe there is a readme and or a CFG file in the zip file folder that contains the migration tool that can read the FD and FS XML files and exchange them between Excel and XML. I don't recall anything more specific than that.

The configuration variable is "_CIVIL_STANDARDS_IMPORTEXPORT = 1". From the Readme.txt:

USAGE:

1. Set a workspace config variable to enable importing and exporting. There is a config file
included for your convenience. Copy the file as shown below to enable importing and exporting.
"C:\Program Files\Bentley\OpenRoads Designer CONNECT Edition\OpenRoadsDesigner\config\appl\FDIE.cfg"
2. Export your current feature symbologies and or definitions to XML file(s)
by right-clicking on the header within OpenRoads Designer Explorer for Features or Symbologies.
3. Run the provided executable and follow the prompts to select the Feature Symbology or
Feature Definition XML file.
4. This will create an Excel Spreadsheet.
5. Make your changes to the Excel file(s) and save the file(s) when completed.
6. Run the executable a second time, this time selecting the Excel file(s) to use to
overwrite the original XML file(s).
7. Import the XML file(s) to a DGNLib file to see the revised Feature Symbologies or Feature Definitions.

Thanks for filling in the blanks. As a CAD Manager, these tools are a Godsend! I've even used them with V8i files, bringing them into ORD just to document what we have in V8i. And to find rogue Level Names, Cells, Text Styles and anything else that might have crept into our Workspace that should not be there. 

To import The XML data, you need to bring in any needed Levels, Element Templates, Feature Symbologies and Feature Definitions, in that order.