Finding Help for Interface Builder
Step-by-step instructions for performing common Interface Builder tasks are available directly in Xcode. Control-click anywhere on the Interface Builder canvas to see a short list of the most common operations. Choose Show All Help Topics to see all help articles for the source editor.
Because the Control-click key combination is used by Interface Builder to make connections, Control-click the canvas—not any object in the user interface—to get the shortcut menu with the list of help articles.
Select a task, and a help article appears in the Xcode documentation viewer window.
More help is available in other help books including:
Interface Builder Help
Interface Builder Connections Help
Interface Builder Object and Media Help
Auto Layout Help