title: How to enable header_position in TYPO3 7.6
body: <p>In versions prior to TYPO3 7.6 you could select a position for your header within your content element (left, middle, right as far as I remember).</p>
  
  <p>The field which has been used for storing that information in tt_content <code>header_position</code> is still available.</p>
  
  <p>However, it will not appear in the backend. 
  I'm also using <code>fluid_styled_content</code> for rendering my content, and the Header partial doesn't contain any reference to the position, but only to the layout field.</p>
  
  <p>My question is: How can I reenable that field and use it to position my headers?</p>