\startenvironment xits

%\startmode[xits]
  \setupbodyfont[xits]
%\stopmode

\startmode[modern]
  \setupbodyfont[modern]
\stopmode

\startmode[cambria]
  \setupbodyfont[cambria]
\stopmode

\startmode[asana]
  \setupbodyfont[asana]
\stopmode

\startmode[euler]
  \setupbodyfont[euler]
\stopmode

\startmode[lucida]
  \setupbodyfont[lucidaot]
\stopmode

\startmode[debug]
  \tracingoutput=1
  \tracingonline=1
  \showboxdepth=\maxdimen
  \showboxbreadth=\maxdimen
\stopmode

\setuplayout
  [width=fit,
   height=fit,
   header=0pt,
   footer=0pt,
   leftmargin=0pt,
   rightmargin=0pt,
   backspace=2em,
   topspace=2em]

\setupalign
  [line]


\stopenvironment