\enableregime[utf]
\usetypescript[serif][handling][quality]
\usetypescript[sans][handling][quality]
\definetypeface [iwona] [ss] [sans] [iwona] [default] [encoding=ec]
\definetypeface [iwona] [mm] [math] [iwona] [default] [encoding=ec]
\setupbodyfont[iwona,ss, 10pt]
\setupalign[hanging]
\def\emdash{—}
\starttext
\input zapf
\stoptext