This panel is one of the key ETS panels. Use this panel to create and edit the logical links between the Group Objects of the KNX devices by means of Group Addresses. The lowest level element in a "Group Address chain" is always a (Sub-) Group Address; you can only link Group Objects with a Group Address.
Changing a Main or a Middle Group in an installation that has already been commissioned, changes also all the subordinate Group Addresses at the same time. Consequently, the affected devices have to be re-downloaded.
In former ETS versions, the main group range used to be limited to: 0..15. As of ETS4, the number of possible main groups is doubled, i.e. to: 0..31. When using this extended range, please make sure that all Line Couplers, Backbone Couplers and regular devices in the installation support main group indexes greater than 15.
Address ranges for Group Addresses are only available when using the free-level Group Address style.
The properties of each element can be found here.
To add elements, see here.