Changes

== Enabling and Disabling Auto Layout in Interface Builder ==

By default, Auto Layout is switched on for user interface design files, both for storyboard and individual XIB files. Begin by selecting the Main.storyboard file from the project navigator panel and select the main scene (the main scene in a storyboard can be identified by the arrow pointing to the left side) before displaying the File Inspector panel (View -> Utilities-> Show File Inspector). Located within this inspector is an option labeled Use Auto Layout as illustrated in Figure 19-1.