\setupbodyfont[dejavu]

\setuppapersize[A4][A4] %% [A1][A1]

\showframe

\starttext

\scale[factor=max,width=\textwidth,height=\textheight]{\framed[frame=on]{\input tufte \input tufte \input tufte }}

\externalfigure[cow][s=.1]
\externalfigure[cow][width=15mm]
\externalfigure[cow][scale=123]
\externalfigure[cow][scale=1100]
\externalfigure[cow]
\externalfigure[cow][sx=.1,sy=.2]

\externalfigure[cow][width=10cm,height=3mm]

\stoptext
