How can I change my node group interface to more easily edit the Group Input/Output nodes? I was watching a tutorial and the Node Editor interface is totally different than mine at factory settings, when inside of a node group.



My default interface when entering a node group is that the background is translucent green and there is a Group Input/Output node that must be managed in the Interface roll out of the Properties Shelf (N). The tutor doesn't account for this discrepancy, but carries on as if his setup is just how Blender works/looks by default. 

How do I get my interface to look like this, where everything is easily managed right in the Node Editor? Is this an add-on? If so, which one?
That's just the way node groups display in the current version of Blender. The other screen shot is from an older version of Blender.

In your node group, you can edit all the input/output settings by hitting the N key which will open the property panel on the right. Clicking on each input/output in the list will allow you to change the properties for each one there.