I'm using the command
pandoc -t beamer in.md -o out.pdf to generate slides from a markdown file. It seems the default aspect ratio is 4:3. How do I set it to 16:9?
aspectratio variable in the YAML metadata at the beginning of the file:
--- title: 'My presentation' author: - Author One - Author Two ... aspectratio: 169 ---
Check the man pages for more information.