To Add:

1) Select the Administrator you would like to add to a group, "More Actions", and then "Add To Group"

2) Select the group(s) you'd like to add, then click "Submit"


To Remove: 

1) Click the Edit icon for the Group Administrator that you'd like to remove from the group



2) Scroll to the bottom of the page. Click the blue X for the group(s) that you'd like to remove the administrator from. 



3) A message will appear asking 'Are you sure you want to delete this Record?' Click 'OK' to remove the administrator from the group.