The "Groups Node" in C-Bus Toolkit is used to show a list of all Groups for a specific Application on a Network. The list shows static elements of all Groups such as the Address and Name.
If you're connected to a Network the list also shows information about the Groups 'dynamic' state on the Network. Information such as the Groups current level and the unit that LAST modified the group are shown. As you can see below, the selected Group "Kitchen Downlights" was last 'controlled' or 'modified' by the unit at address 4, which was a Key 4 with a tag of "Kitchen Switch". Buttons are provided to Edit the "last modifying unit".
A useful diagnostic and fault resolution feature!