title: print pdf horizontal half page half empty
body: <p>hi I want to print powerpoint slides (available as pdf) so that I will have one slide on each page but only half the page, so I have the other have for personal notes. 
  Hase someone an idea on how to accomplish this without manually adding empty pages after each page?
  <a href="https://i.stack.imgur.com/bji0Q.jpg" rel="nofollow noreferrer">enter image description here</a></p>