title: ImageMagick apply watermark multiple times
body: <p>Currently, with ImageMagick I apply <code>watermark.png</code> on top of <code>picture.jpg</code> in the center using:</p>
  
  <p><code>convert -size 700x1300 -composite picture.jpg watermark.png -gravity center -geometry 700x1300 output.jpg</code></p>
  
  <p>This nicely overlays my watermark in the middle of the image. However, I want to achieve this effect in the top-left, center, and bottom-right. I've tried combining multiple <code>-composite</code>s with no result. I would like to avoid calling 3 different commands to avoid the extra overhead it introduces, but I'm starting to believe it isn't possible without doing so.</p>
  
  <p>What can I do to achieve the three watermark positions in one command, <code>NorthWest</code>, <code>Center</code> and <code>SouthEast</code>?</p>