\starttext

\switchtobodyfont[roboto]

\rm\input ward\par
\ss\input ward

\blank

\switchtobodyfont[roboto-condensed]

\rm\input ward\par
\ss\input ward

\blank

\switchtobodyfont[roboto-medium]

\rm\input ward\par
\ss\input ward

\blank

\switchtobodyfont[roboto-light]

\rm\input ward\par
\ss\input ward

\stoptext