CELL driver resolution problem

Malcolm Williamson writes:

By the way, if you use a virtual window manager, such as tvtwm, you can define
a GRASS monitor of astronomical dimensions, enabling you to view these kinds
of raster files at full resolution without having to change regions.

> This is not quite what I had hoped for from the CELL driver, as I think
> we want to be able to print each row of a 2700 row region on a 300 d.p.i.
> printer in 9" to take advantage of the higher resolution in the printer
> than we can get on our screens.
>

Out of interest, how many different ways are there of taking an oversize
graphic and scaling it down to print size, whilst simultaneously increasing
resolution? I am only aware of one method: using the postscript 'save' option
of XV.