I would like to suggest a feature where a customer can select a "Add New" button.
this feature will then insert information based on what the creator has selected.
E.g. New Page (Page will be hidden from view until this option is selected)

I currently have an order form where customers specify how they want their product to be fitted using a diagram with reference points and numbers. However with jobs requiring multiple items, I am currently having to send them multiple documents for each product. rather than have the option to add a second page to form where they can continue filling details as needed.