title: Android Studio - view both Text and Design preview of layout
body: <p>In Android Studio, how can I view both the text and design preview of an XML layout side by side. </p>
  
  <p>I could see it by default when I installed Studio, but now that is gone, 
  and I'm not sure why. I can only see or the other.</p>
  
  <p>How do I re-enable it?</p>