Controlling the size of the Body section on Reports

This is a reposting of an article I originally wrote on my Developing for Dynamics GP blog.
The question of how to control the size of the body section of a document such as Sales Order Processing (SOP) Orders and Invoices or Purchase Order Processing (POP) Purchase Orders has come up a number of times before. It was asked again on a Community Forum post a while back. So I thought I would post the answer here.
