Since 2 days, when starting the app in the emulator it opens the app 1/4 of the screen size. iPhone 6 and tested it with the iPhone 6 Plus as well...
even home is quarter-si
I am quite new in iOS. I had the same problem, this is what I did and resolved
1 - xcode 7.1.1.
2 - In the file Inspector, right hand Pane
3 - In "Interface Builder Document", I chose Xcode 5.1; the one I used to do programming before El Capitan and new Xcode installed.