As far as I know this is not possible, the idea of the viewer is to show pages that have no length limit, they simply keep going until a ThrowPage is received.

When printing, or exporting to PDF, the expected output is by page size, and therefore you will get new pages every time (for example) the limit of an A4 piece of paper is reached.

To try to accomplish what you want, you would need to find a way of always having only an A4 page worth of data in a certain group, and throwing a page at the start or end of that group. This would become unworkable pretty wuickly and I wouldn't recommend it as an approach.

Nigel West.