title: Add content from within another content type in Drupal 7
body: <p>I'm pretty new to Drupal and I can't figure out how to do the following:</p>
  
  <p>In Drupal 7, I have a custom content type called 'Opening' and I want users to be able to apply to an opening. 
  So I created another content type ('Application') and I'd like the Opening content type to have a static field of some sort (ideally a button but could live with a basic link for now) that creates a new Application content (i.e. points to mysite/node/add/application). Besides, the Application should be somehow prepopulated with the Opening it "came from" (hope this makes sense). </p>
  
  <p>I thought this would be straightforward but I've been searching around and I couldn't find a way to implement this.</p>
  
  <p>Any help would be greatly appreciated.</p>
  
  <p>Thanks!</p>