\setupbodyfont[dejavu]

\showframe

\starttext

\start

\enabletrackers[visualizers.box]

\items[alternative=left]{a,b,c}
\items[alternative=left,align=middle,textalign=flushright,distance=1em]{a,b,c}
\items[alternative=right]{a,b,c}
\items[alternative=inmargin]{a,b,c}
\items[alternative=top]{a,b,c}
\items[alternative=bottom]{a,b,c}
\items[alternative=bottom,align=flushleft,textstyle=bold,color=red,textcolor=green]{a,b,c}

\stop

\stoptext
