Hi there,
 
I know there is a command \setupbackgrounds[page][background=???], and I can use \defineoverlay[page][\useMPgraphic{page}], then use MetaPost to draw the page background. But I also use something like \setuppapersize[A7][A3] to compose the output, and it seems that the \setupbackgrounds command only affect on A7 sub-paper. I also noticed a command \setuplayout[marking=color] that really acts on the A3 paper rather than the subpaper. So I think there should be such a macro that handles the whole page's background. Can anyone tell me about it?
 
Thanks.

--
Sincerely yours,
Chen
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          Zhi-chu Chen | Shanghai Synchrotron Radiation Facility
         No. 2019 | Jialuo Rd. | Jiading | Shanghai | P.R. China
             tel: 086 21 5955 3405 | zhichu.chen.googlepages.com
                                               | www.sinap.ac.cn
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