start-page in dc<%>
Starts a page, relevant only when drawing to a printer or PostScript device (including to a PostScript file).
For printer or PostScript output, an exception is raised if
start-doc is called when a page is already started, or when
start-doc has not been called, or when
end-doc has been called already. In addition, in the case of PostScript
output, Encapsulated PostScript (EPS) cannot contain multiple pages,
so calling start-page a second time for a
post-script-dc% instance raises an exception; to create
PostScript output with multiple pages, supply #f as the
as-eps initialization argument for
post-script-dc%.