Hi Tom,
To build nice looking documents you can use this module: https://appstore.home.mendix.com/link/app/2026/Appronto/Word-Merging-4-Mendix
It uses MS Word as a input document and will merge data from your Mendix application. So the business users can manage the template.
Please try out here: https://appstore.home.mendix.com/link/app/1584/Appronto/Appronto-Modules-Example