pic diagram on arbitrarily large page

[Robert Goulding]

I am trying to draw a huge diagram with pic - a chart with lots of boxes
and arrows, and pic is a good tool for it. How do I get beyond the
constraints of the paper size? I want to be able to keep extending the
chart vertically and horizontally to an arbitrary extent. As it is, I have
already run out of space, and new boxes do not appear on the chart (or
appear in the wrong place).

R.

-- 
Robert Goulding
Director, John J. Reilly Center for Science, Technology, and Values;
Director, Program in History and Philosophy of Science;
Assoc. Professor, Program of Liberal Studies,
Fellow, Medieval Institute,
University of Notre Dame.