title: IOS app Nav bar back button
body: <p>I have looked at all the navigation bars on all the story board scenes of my app, and I have gone through all the view controller m. files and there is no mention anywhere of the navigation bars settings. The mystery is that I have two different pages, one where the back button is in lower case (back), another where it is in title case (Back), and other pages just have the cursor image &lt; or nothing at all. If I click on the storyboard navigation bar area, it highlights in blue, and there nothing obviously there.</p>
  
  <p>I cannot find where this has been defined !!
  Any ideas?</p>