Customizing document styles with FSharp.Markdown.Pdf

Following on from my last post on formatting a Markdown document into PDF using FSharp.Markdown.Pdf, if you don’t like the default styling (which I tried to mimic style Github formats Markdown documents with) you can set your own styling for the different types of Markdown elements by going down a level of abstraction.

The FSharp.Markdown.Pdf.MarkdownStyleNames module defines all the names of styles used to format the different Markdown elements (e.g. heading 1-6, code block, listing 1-3, etc.) into PDF. To override the default styles, you need to:

  1. Instantiate an instance of the Document type from the MigraDoc.DocumentObjectModel namespace.
  2. Add the predefined style names from the aforementioned MarkdownStyleNames module to the document’s collection of styles.
  3. Tweak the style to your liking.
  4. Call the FSharp.Markdown.Pdf.PdfFormatting.formatMarkdown function with the Document value.
  5. Voila! You now have an instance of PdfDocument which has been formatted with your custom styling.

to see these simple steps in action:

You can compare the original and customized PDF outputs here and here.

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Yan Cui

I’m an AWS Serverless Hero and the author of Production-Ready Serverless. I have run production workload at scale in AWS for nearly 10 years and I have been an architect or principal engineer with a variety of industries ranging from banking, e-commerce, sports streaming to mobile gaming. I currently work as an independent consultant focused on AWS and serverless.

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