title: Keyboard shortcuts for Zeppelin Notebook
body: <p>There was an old jira for keyboard shortcuts. But there did not appear to be an associated document</p>
  
  <p><a href="https://issues.apache.org/jira/browse/ZEPPELIN-391" rel="noreferrer">https://issues.apache.org/jira/browse/ZEPPELIN-391</a></p>
  
  <p>Is there a comprehensive cheat-sheet for the shortcuts?  Especially to compare to the excellent <code>jupyter</code> keyboard shortcuts; e.g. dd to delete a cell.</p>