\setupexternalfigures[location=default]
\definelayer[chaptertext][width=\paperwidth,height=\paperheight]
\define[2]\ChapterCommand
{\setlayerframed
[chaptertext]
[x=3cm,
y=8cm]
[frame=off]
{#1 – #2}}
\definemakeup[chapterpage][page]
\setupmakeup
[chapterpage]
[pagestate=start,
before={\setupbackgrounds[page][background=chapterimage]},
bottom={\placelayer[chaptertext]}]
\defineoverlay[chapterimage][\overlayfigure{\structureuservariable{image}}]
\setuphead
[chapter]
[ before={\startmakeup[chapterpage]},
%command=\ChapterCommand,
placehead=empty,
after={\stopmakeup}]
\setuphead
[title]
[ before={\blank[big]},
after={\blank[2*big]},
command=]
\starttext
\completecontent
\startchapter[title={Understanding the Food Industry}][image=mill.png]
\input knuth
\stopchapter