title: Prawn Rails, generate table with some content not bound by table
body: <p>I am trying to build a fairly complex pdf using Prawn in Rails. </p>
  
  <p>The document I am trying to generate is a form of script split into four columns. The script is comprised of a collection of 'snippets', which are iterated through and populate the third column. If a snippet has special properties it can also populate any one of the other three columns as well. This is all achieved very easily using tables. However, I then need to be able to draw an arrow of some description (using prawn graphics) at certain points spanning between the table columns (please see attached image).</p>
  
  <p><a href="https://i.stack.imgur.com/0wMoZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0wMoZ.jpg" alt="demo table"></a>        </p>
  
  <p>How is this achieved since content is bound by table cells? Is there a way to later draw these lines using cursor points or some other method?</p>
  
  <p>Please ask for further for clarification if I'm not making any sense.</p>
  
  <p>Thanks </p>