s_a_r_ieee@cox.net wrote:

> Where should I look to find the docs for customizing a 
> package built from pkgsrc, and the specifics for 
> customizing rxvt?
> 
> I think it should be as simple as setting some values in 
> /etc/mk.conf, and doing a "make deinstall reinstall" but 
> I don't know where to find the values.  

make clean
make
cd works/rxvt-*
./configure --help|less

Note the flags you want and put them into the variable CONFIGURE_ARGS
you'll find in "pkgsrc/x11/rxvt/Makefile". Then 

make clean
make install

HTH
Michael