WordProcessingOptions.PageSize property

The size of the output page. The default value is Unspecified which means that a page size is set in a page settings (Page Setup) is used. When rendering HTM and HTML files the default page size is set to Letter 792 x 612 points. As a result, some of the content may not fit into the page frame. Set a larger page size e.g. A3 to fit the contents.

public PageSize PageSize { get; set; }

See Also