I am not sure about your question,
do you mean that what happens when the smart form output is a 1000-page document?
In this case, you will get a 1000-page document, qith the content according to the pages defined in your smartform. For example, if your smart form only defines one page, the content of the main window is transported to the next 999 pages. If you need more page "models" then you need to create additional pages in your smartforms.
I don't know if this helps you, can you elaborate more your doubt?
David