This will show you how to modify Group information, such as Name and Permissions, via the Group Administration module.  

Instructions

1. Navigate to Modules > Site Tools > Group Administration
   
   
2. Select an existing group to modify
   
3. Modify Group Name and Description in the Settings tab
   
4. Modify Module Permissions in the Modules tab
   
5. Modify Page Permissions in the Pages tab
   
   
   • Expand All Menus: Allows you to see pages in each menu
   • Collapse All Menus: Allows you to view menu titles as displayed above
6. Check or uncheck users to be in this group in the Users tab
   
7. Click Save at the top of the page