This Version is Out of Date
You can find the updated Miva 10 Reference Guide here
The Resource Groups tab allows you to manage resource groups and see all of the resource groups in one place.
The same options are available on the User Interface > Resource Groups tab as are available on the Resource Group dialog that appears when you click on the from CSS Resources or JavaScript Resources.
You can create your own custom resource groups. For example, if you wanted a JavaScript Resource Group in the global footer for tracking scripts, you could add one.