title: Xcode - How to make a universal app
body: <p>I have an iPhone app and I want to make it universal, but I don't know how to go about doing this, at least properly anyway. Earlier I tried the "upgrade current target to iPad" but it didn't work properly, but luckily I saved a backup from just before trying it.</p>
  
  <p>Anyway, can anyone advise me on how to do this?</p>