How can I view the object hierarchy in XCode 4 like XCode 3 does?

In Information Builder, I need to view/navigate all the objects in a the XIB and like to use the obj开发者_开发问答ect hierarchy view in Xcode 3. However, in XCode 4, it just show the top level objects, but not the child objects. How can I view them all in XCode 4?

Thanks for the other answers, that helped me. For future answer seekers, it looked a bit different for me in xcode 4.2. Pressing the grey"play" button in the bottom left corner poped out the hierarchy.

Click on the arrow in the lower left of the gutter that shows the objects

You can also simply drag the object view window from the right side of the window. It will then show all the objects and their hierarchy.