title: Sitecore: How to add a set of "fields" to a rendering
body: <p>In Sitecore, how would I go about adding a couple of fields to a rendering (.xslt)?</p>
  
  <ul>
  <li>Changing the "template" of the render, makes it so it is no longer a proper rendering.</li>
  </ul>
  
  <p>The goal is to create a rendering, the user can add to a placeholder in the page editor.</p>
  
  <p>Edit:
  Currently im trying the same using sublayouts (.ascx)
  - The sublayout is of a template of (..sublayout), with a "custom" template added to the "Parameters Template" field.</p>