PdfDocumentTableOfContentsHeadingSelectors Property

The CSS selectors of the elements of the HTML content that become entries of the table of contents, one selector for each level: the first selector gives the level 1 entries, the second one the level 2 entries and so on, up to level 6. When this property is set the H1 to H6 headings and the data-heading attribute no longer select the entries, an element still being excluded with data-heading="false" and its title still being taken from data-heading-text when present. The default is null, the entries being created from the headings of the HTML content

public string[] HeadingSelectors { get; set; }