You will find Group Features under your Group's manage section (Manage your Group). Group Features are the sections that appear in your group navigation, such as the Library or Media section. Each feature will be listed with its setting, as shown below:
As the owner or administrator of a Group, you can enable or disable these features as desired. By selecting the Edit link, you will be directed to a page where you can define this setting by checking or not the box next to each feature
Once you're ready, select Save configuration - you will immediately notice the update in your Group's navigation.
Frequently Asked Questions
[+] Do I have to worry about losing content if I disable a feature?