Select the OPC Systems Service that you desire to extract the Data Logging configuration from and select Export CSV to generate a base Comma Separated Variable file for all of the logging groups properties and individual CSV files for each of the logging groups fields. The individual file names will include the base name with underscore following by the group name.
You can then use Microsoft Excel or other CSV compatible application to add or modify data logging properties and fields. Use the Import CSV feature to then import the modified CSV files.
If you wish to export just the individual field names right click on the Tags field list and select CSV Export.