The following articles contains instruction on how to grant Full Control permission to a user or group.

1. Open your SharePoint 2010 site.

2. Along the top of the Ribbon, select the Site Actions drop down menu and choose Site Settings.

3. Under User and Permission, select People and Groups.

4. From here you can select the user or Group you wish to add permissions to. For Group Permission, choose Setting and select  View Group Permissions.