Between these triple-dashed lines, you can set predefined variables (see [below](#predefined-variables) for a reference), or even create custom ones of your own. These variables will then be available to you through the <code>[$frontmatter](./global-computed.md#frontmatter)</code> variable.
Here's an example of how you could use it in your markdown file:
Here’s an example of how you could use it in your Markdown file:
