I have Xcode 4.2 and I am a complete beginner. One of my files is called MainStoryboard.storyboard. When I first started working, this showed the different iOS screens pictorially. Now I see (what I presume is the storyboard in) code.
How can I switch back to the visual format?
In the left-column project Navigator in XCode, Control-click on your Storyboard item and select: Open As -> Interface Builder – iOS Storyboard