title: Set double spacing and line numbers when converting from Markdown to PDF with pandoc
body: <p>I am using markdown &amp; pandoc for scientific writing, I know I can change margins of the final pdf using </p>
  
  <p><a href="https://stackoverflow.com/questions/13515893/set-margin-size-when-converting-from-markdown-to-pdf-with-pandoc">Set margin size when converting from Markdown to PDF with pandoc</a></p>
  
  <p>but very often the journals require double lines and line numbers in submitted manuscripts, the question is how to change these, I don't know much about LaTex so I am lost in that jungle.</p>
  
  <p>Thanks!</p>