This video demonstrates creating a group in the Group Manager.
Timestamps:
0:00 - My Groups, Queue, Dept, Unit Tabs
2:18 - Creating a Group
5:00 - AD Group General Tab
8:38 - Creating an Email Distribution Group
9:46 - Adding Members on the Manage Tab
13:17 - Uploading a Spreadsheet
17:28 - Subscription Tab
18:36 - Usage/Privileges Tab
20:31 - Mailmerge in Email+
22:40 - Including the Group & the Preview Tab
24:20 - Creating a Security Group/Transfering & Sharing