title: Show column heading only in drill down
body: <p>I have created a crystal report with a number of items in an invoice. I have grouped the details based on the invoice number &amp; suppressed the detail section with <code>Drill-Down</code>.</p>
  
  <p>The problem is I need the column headers to be displayed only in Drill-Down mode. Not when it's displaying just the summaries. How can I hide the column headings ?</p>
  
  <p>I have found several sort of hack like solutions, but is there a standard way/feature in CR to do this?</p>