This tool is easy to use, what you need is to have the extension (.xif) file in (HTML to PDF Converter - SelectPDF) application installed in your environment and add the action (ConvertHTMLToPDF) into your module and convert any HTML into PDF straight forward with additional options to include:

1- Header with fixed size in every page

2- Footer with fixed size in every page

3- Make it as A4 size

You may install the demo app (Demo - HTML to PDF Converter - SelectPDF) to check how to consume this extension in a Reactive Web Application.