You can specify default settings for your group that include:
Community Server applies the group default settings to all of your groups.
Procedure
1. Navigate to Control Panel Dashboard > System Administration > Group Administration > Configuration. The task flow tabs are Permissions, Presentation, and Enable Sub-Applications.

2. Specify the group default settings.
Permissions Tab
The Permissions tab allows you to specify which user roles can create groups.

Check the checkbox for any users you want to give permission to create groups. Click here for more information about permissions.
Default Presentation Tab
The Default Presentation tab allows you to specify the group theme and avatar settings.

-
Enable Themes – Specifies whether or not the group owners can select a custom theme for the group.
-
Default Theme – Specifies the custom theme to use for the group.
-
Enable Avatars – Specifies whether are not avatars can be used for the group.
-
Avatar Dimensions – Specifies avatar dimensions.
Enable Sub-Applications Tab
The Enable Sub-Applications tab allows you to enable or disable the applications available to the group.

-
Pages – Enables or disables groups to create pages of content.
-
Blog – Enables or disables the group blog.
-
Media – Enables or disables the group media gallery.
-
Forum – Enables or disables the group discussion forum.
3. Click Save.