title: React Navigation (Native): custom header
body: <p>I'm having an issue with the <em>react-navigation's drawer</em> component not covering the whole application. I'm really struggling as I'm new with React Native and can't figure out the &quot;clean way&quot; to do it</p>
  <p>Here's an example:</p>
  <p><a href="https://snack.expo.io/ZZqxmOQMw" rel="nofollow noreferrer">https://snack.expo.io/ZZqxmOQMw</a></p>
  <p>When you press on &quot;Toggle drawer&quot; I expect it to cover the whole app, including the header, but it only covers the main content. On their examples, the drawer always only work with no content nor header.</p>
  <p>Thank you!</p>