When you create or edit a region startup file, you can add or change the associated resource definition file. The file can reside in the local/network file system, or in the cross-region database.
In the Properties window, the region startup's General settings display.
The name of the current resource definition file if any displays in the right hand column.
A message prompts you to select a file from disk, or from the cross-region database.
If you changed the resource definition file for a region, you must cold-start the region for the changes to take effect.