[DVIPDFMx] supporting trimbox, &c. when making a .pdf

[William Adams]

I'm using xetex and xdvipdfmx to make a .pdf of a customized storybook  
and need for the document to have its trimbox set so that it will  
``bleed'' when printed.

But while xetex supports selecting such boxes when placing a .pdf, it  
doesn't support it when making a .pdf --- basically I need something  
analogous to pdftex's \pdfpageattr:

\pdfpageattr{/TrimBox [9.0 9.0 621.0 801.0] }

Bruno Voisin suggested this could be done via the \special mechanism?

Exactly what command would I need and where would it need to go in  
my .tex file?

Thanks!

William


-- 
William Adams
senior graphic designer
Fry Communications