In case you click the 'Manage article groups' button, a list appears containing all article groups that are already classified in the EZ-base classification but are yet to be matched to ETIM classes.
To modify article groups, you can double click an article group. The article group screen will open.
You can manage article groups in the Assortment tab -> Manage article groups.
Manage article groups button
This button alows you to view what article groups are still to be classified in the ETIM classification.