Xcode: Autosizing preview window missing

Question

I am learning iOS and using Apress - Beggining iOS 5 development book. The book says there is a window to preview UI elements\'s autosizing behaviour in size inspector as:

Answer 1

While you are editing XIB or storyboard file. You can see "Size Inspector" tab panel at right menu. It has a ruler icon.

But the view -that you want to set it's layout- must be selected. At this sample on screenshot, a Label (text:social) is selected.