Insert complex HTML elements into Markdown
Shortcodes can inject arbitrary and configurable HTML (or automated Markdown) in Markdown content — Hugo offers them as “Markdown’s hidden superpower”.
A marginal note contains additional important but nonessential information. It explains some context, sheds light on a detail or speculates on a given topic etc.
Marginal notes add further information elegantly and unobtrusively. We can add them with the shortcode mnote.