The Navigator view is a standard filesystem style explorer limited to showing only content available in the Storyboard workspace.
The Navigator view only displays content that has been imported into the workspace and starts with the top level Storyboard Project directories that have been created. Since the workspace allows multiple Storyboard projects to be shown, it is possible to work on multiple projects concurrently all within the same workspace with multiple editors open targeting different Storyboard projects. Content and resources can be copied and pasted among the different editors.
The Navigator view provides a variety of filters to hide/show different file types as well as the ability to group projects together as 'working sets' and then to only display the content from those working sets. For more details on configuring the Navigator and filtering workspace content refer to the Eclipse help> > .