To identify regions or group members used in IFs, click on Extended Features on the Main Menu of IFs, and then select Manage Regionalization.

This feature of IFs allows users to identify which countries/regions are represented in certain groups. By clicking on this feature, you will be presented with a menu that looks similarly to the one below:

By clicking on Switch to Groups, the list of countries/regions will become a list of groups. By clicking on any of the groups in the left-hand list, the members of that group will appear on the right hand side.