1) Go to Google Groups
2) Click “My groups” and then click the group which you want to edit the settings
3) Once in the appropriate group, click “Manage”
4) Find the person you want to make manager, check the box next to their name. Find and click the “Actions” dropdown list. Select “Add to role” which will expand the menu and you will be able to choose what role to give them. Click the “Manager” option, and they will be made manager.
Last Updated: 11/12/15