title: Filing org-mode items under a new tree
body: <p>Say you have a tree of the following form:</p>
  
  <pre><code>* Top
  ** Item A
  *** Lower
  ** Item B
  ** Item C
  </code></pre>
  
  <p>What I would like to do is to be able to make a region containing Item A and Item B, and have a command run to change it into this:</p>
  
  <pre><code>* Top
  ** 
  *** Item A
  **** Lower
  *** Item B
  ** Item C
  </code></pre>
  
  <p>With the cursor at the blank item. I am wondering if something similar is already written into org-mode. If not, I can write it myself, but in that case I am wondering how I should loop through the lines in my region to shift them, avoiding items which are on a lower level than my starting one.</p>