To merge two groups of groups, enter editing mode and select the Group of Groups layer that you want to edit.

Select two Group of Groups. The Merge tool will be displayed in the tool palette.

Click the Merge button to open the Merge form. The Merge form opens showing the two selected routes to be merged.

The two selected records will be end-dated, and one new merged record will be created, which will inherit its name and attributes from the first Group of Groups record listed. The sequence can be reversed by clicking the swap button .