title: How to make use of the "pinch" touch effect in the Sencha Touch framework?
body: <p>I'm trying to figure out how to make use of the "pinch" touch effect with Sencha Touch. Do you know of any examples that help with the first steps?</p>
  
  <p>The documentation seems to be rather silent about it.</p>
  
  <p>Specifically I'm looking for a common task as a starter:</p>
  
  <p>I want to zoom it - and - zoom out of an image in JPEG format. Do you know if the "pinch" method allows that?</p>