title: converting a pdf page to an image using GraphicsMagick
body: <p>How do I convert only page 2 of a pdf file to a jpg image file, using GraphicsMagick command line prompt? </p>
  
  <p>What option can I use in the gm.exe convert command?</p>
  
  <pre><code>gm.exe convert testing.pdf testing.jpg
  </code></pre>