I think it would be useful to have a “Reveal” command (perhaps in the View menu) – when a item is selected in the “Macros” pane of the editor the command (or ⌘R – a common shortcut for this type of thing) would change the focus in the “Groups” pane to that macro’s enclosing group.
Yes, the group is shown in the upper right corner of the edit pane for a selected macro – this suggestion is just a additional navigational aide. Perhaps this feature already exists?