An action bar makes actions available to users. The action bar is typically displayed on the right-hand side of the browser subapp. The action bar definition organizes actions into sections (green label) and groups (between horizontal lines). Availability rules determine which section is displayed to the user. For example, when the user selects a content item in the browser subapp, availability rules display only actions that are relevant to working with that item. A group contains actions that have something in common, such as actions for adding things.