title: How to edit exif metadata by graphicsmagick command?
body: <p>How to edit or add exif metadata by graphicsmagick command? I've tried the following:</p>
  
  <pre><code>gm convert -set EXIF:XPKeywords "bird, sleep, moon" bird.jpg bird2.jpg
  </code></pre>
  
  <p>My command is executing successfully and the image is creating but the exif metadata is not updating.</p>