There are four contexts in the interface: server, project, group and document. They are exposed in the horizontal navigation menu and are used for configuring user interface components such as pages.
The four contexts are exposed in the horizontal navigation menu across the top of each page. The context progress from left to right in the order they are listed above. Each change of context triggers changes in the the fundamental components of the interface. These components include the navigation sub menus, the blockset and the action icons.
The screenshot below was taken while viewing a document, where the home icon is the server, 'acme' is the project, 'specs' is the group and 'Detailed Business Requirements' is the document.