\special{epsfile=foo.ps hscale=0.5} \special{epsfile=foo.ps vscale=0.5} \special{epsfile=foo.ps hscale=0.5 vscale=0.5}
\special{epsfile=foo.ps hscale=0.5}
\special{epsfile=foo.ps vscale=0.5}
\special{epsfile=foo.ps hscale=0.5 vscale=0.5}