[reportlab-users] doc.topMargin in SimpleDocTemplate

[Michael Hipp]

I'm building a simple report like this:
     doc = SimpleDocTemplate(out, ...)
     doc.topMargin = 1.0*inch  # space for header on 1st page

I'd like to change that topMargin to 0.0 in my onLaterPages() routine, but it 
seems fixed once set. Is it possible to alter it once building has started?

Thanks,
Michael