Determines which Markdown flavor to use.

Choose between ATX (#) or Setext (===) style headings.

Choose which character to use for unordered lists.

Choose between fenced (```) or indented code blocks.

Choose between inlined or referenced link styles.

Choose between asterisks (*) or underscores (_) for emphasis.

Specify HTML tags to keep as-is in the Markdown output.

Specify CSS selectors for elements to remove before conversion.