[pdftex] Setting up envelopes

[The Thanh Han]

On Sat, Oct 26, 2002 at 09:47:50AM -0400, John Culleton wrote:
> On Friday 25 October 2002 09:40 pm, The Thanh Han wrote:
> >
> > The reason of strange behaviour in your plain tex file is that if
> > \pdfhorigin and/or \pdfvorigin is set to 0pt, then an value of 1in is
> > used instead. To get no margin/top, set them to 1sp instead.
> >
> > HTH,
> > Thanh
> >
> Can I use negative values with these quantitities e.g.,
> \pdfvorigin -.5in
> ??

yes 

Thanh