title: Bootstrap "Starter template": When is the menu-icon/button shown/hidden?
body: <p>I'm studying the Bootstrap "<a href="http://getbootstrap.com/examples/starter-template/" rel="nofollow">Starter template</a>" and I can't figure out when the menu-icon/button (With the three horizontal lines) is shown.</p>
  
  <p><em>The template is located in the Bootstrapfolder:</em> bootstrap-3.3.6\docs\examples\starter-template</p>
  
  <p>At what whith of the .container (or the .navbar-header) is it shown/hidden?
  Or rather: What triggers it and where can I change it?</p>