Most settings is tied to a Workspace and some configuration/settings is only available for administrators, that is settings like permissions, custom fields, site url, email delivery and so on. Other settings like default senders, Google Analytics and unsubscribe-settings can be made available for editors as well.
Configure a Workspace by navigating to
Administration -> [Workspace] -> Manage.
Here you can configure Workspace-level settings for:
Each workspace have a "Settings"-icon in the tree, navigate to this to configure settings on the workspace.
Here you can configure