title: Add a button at the WordPress Backend Pages menu
body: <p>Hi everybody I am wondering how I can make a button to edit the page content with the WordPress backend, like Visual Composer does. I could not find any code to insert a simple button to edit a page with my own plugin.</p>
  
  <p><a href="http://i.stack.imgur.com/Nm5i6.png" rel="nofollow">Picture of the WordPress Backend with Visual Composer</a></p>
  
  <p>In this picture you can see the two blue buttons, I can not create.</p>