title: Merge Images via Commandline
body: <p>I'm looking for a way to merge several png images with identical dimensions together into a single file via commandline, like this:</p>
  
  <pre><code>file 1: ----------------
          ----------------
          ----------------
  file 2: ................
          ................
          ................
  result of merging files 1 and 2:
          ----------------
          ----------------
          ----------------
          ................
          ................
          ................
  </code></pre>
  
  <p>I've already done some googling but couldn't find anything useful so far. FYI, I'm trying to achieve this in a Powershell script. Thanks in advance.</p>