Set double spacing and line numbers when converting from Markdown to PDF with pandoc

Question

I am using markdown & pandoc for scientific writing, I know I can change margins of the final pdf using

Set margin size when converting from Markdown to PDF with pa

Answer 1

In more recent version of Pandoc, you can use a YAML header and include a bunch of metadata in that, instead of using options on the command line. So, for instance, you can put this at the top of your .md file:

---
title: The Document Title
author:
    - Your Name
    - Co Author
date: \today{}
geometry: margin=2cm
header-includes:
    - \usepackage{setspace}
    - \doublespacing
    - \usepackage{lineno}
    - \linenumbers
---

Document Text

and pandoc will read those options and apply them automatically.