title: twitter bootstrap and canvas positioning
body: <p>i am trying to use twitter bootstrap in one of my projects and what i really want is a header with link and a HTML canvas in the middle of the page. Reference:</p>
  
  <p><img src="https://i.stack.imgur.com/QIDSY.png" alt="Example Bootstrap Page"></p>
  
  <p>When I add a html canvas tag and give it a width and height I get two undesirable effects:</p>
  
  <ul>
  <li>the upper border of the canvas is cutoff and have to apply margin to
  the canvas </li>
  <li>the canvas is pushed to the right and again i have to
  apply margin to it.</li>
  </ul>
  
  <p><strong>I'd like the canvas to stay at the center of the page.</strong></p>