[racket] Format problem of dumping reduction relations to file using render-reduction-relation

Hi,

I want to dump the reduction relations to a ps or pdf file
using render-reduction-relation, but it is not as pretty as what's dumped
in REPL, *especially*, texts are out of pdf margins (tags are unseenable,
etc.)

 Is there anyway to print out relations as what is in the REPL?
or ways to adjust the width of texts in the output file?

Thanks,

-- 
Monica
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