Customize Groups Actions for Salesforce1 Layouts

Overriding the default Salesforce1 actions in the Groups page layout now gives you more flexibility by allowing you to customize the appearance and location of the Edit Group, Join Group, and Leave Group actions.

From the Groups page layout, in the Actions in Salesforce1 Action Bar section, click override the predefined actions. You can then drag the Edit Group, Join Group, and Leave Group actions to different locations in the action bar or remove them.