[Xy-pic] Default color model

[Ross Moore]

Hi Vadim,


On 03/08/2010, at 12:37 AM, Vadim Radionov <vadim.radionov at gmail.com> wrote:

> Dear all,
> 
> Is it possible to set the default color model to "gray" (specifically
> for the arrows, which appear, AFAICS, in "rgb")?  I use dvips driver.

Why do you need this?

Once before I had to do this, since a publisher objected to having RGB in the PDF.
Is yours a similar problem?

It was necessary to edit the PostScript dictionary file that is imported by dvips, changing a single specification of '0 0 0 setrgb' to '1 setgray'.
Xy-pic has a command \dumpPSdict which gives a local copy of the PostScript dictionary, which you can then edit for the next run (with the \dump... command now commented). Consult the Xy-pic Reference Manual, for information about the PostScript drivers and back-end support.

> 
> Thank you in advance,
> 
> Vadim

Hope this helps,

     Ross