title: How to effectively work with multiple files in Vim
body: <p>I've started using Vim to develop Perl scripts and am starting to find it very powerful. </p>
  
  <p>One thing I like is to be able to open multiple files at once with:</p>
  
  <pre><code>vi main.pl maintenance.pl
  </code></pre>
  
  <p>and then hop between them with:</p>
  
  <pre><code>:n
  :prev
  </code></pre>
  
  <p>and see which file are open with:</p>
  
  <pre><code>:args
  </code></pre>
  
  <p>And to add a file, I can say: </p>
  
  <pre><code>:n test.pl
  </code></pre>
  
  <p>which I expect would then be added to my list of files, but instead it wipes out my current file list and when I type <code>:args</code> I only have <code>test.pl</code> open.</p>
  
  <p>So how can I add and remove files in my args list?</p>