1. Xcode editor
   1. purpose
      1. UI
         1. creation
   2. integrated
      1. fully
      2. into
         1. XCode
         2. workspace window
            1. editor area
   3. product
      1. files
      2. nib
         1. interface objects
         2. placeholders
2. editor area
   1. dock
      1. high level objects
         1. placeholders
            1. references
            2. objects
            3. outside nib
            4. nib tied
         2. interface objects
            1. inside nib
            2. creation
            3. nib loading
      2. presentation
         1. icon view
         2. outline view
            1. hierarchical tree
            2. relationships
            3. parent-child
            4. between the objects
            5. in the nib file
   2. canvas
      1. UI design
      2. interface objects
         1. dragged
         2. from
            1. library
      3. connections
         1. interface objects
         2. source code
         3. connections inspector
   3. assistant editor pane
      1. show/hide
      2. editor
         1. source code
            1. interface objects
      3. purpose
         1. work on
            1. at the same time
            2. UI design
            3. interface code
         2. connections
            1. directly
            2. make
            3. between
            4. interface objects
            5. source code
3. utility area
   1. inspectors
      1. interface objects
         1. configuration
         2. connections
            1. between
   2. libraries
      1. interface objects
      2. media