Convert from iPhone storyboard to size class xcode 6

Question

I want to upgrade my iPhone app as soon as possible to a single universal storyboard to be ready with it when the new iPhones are on the market.

I checked "use Size Classes" but the size of my View Controllers are still 320 x 568 how can I change the size to 480 x 640 (wAny hRegular) by example?

Answer 1

I think I found the answer:

1.) Locate your .storyboard, highlight it
2.) Enable Use Size Classes checkbox in the File Inspector

done!

Under Deployment Info I also changed Devices to Universal

-> Copy MainStoryboard to use main iPad interface -> copy