Am 22.11.2014 um 21:32 schrieb John Kitzmiller <kitz@inradius.net>:

Given rectangles with text:

\starttext

Before:\\

\startMPcode

  draw unitsquare xscaled 2cm yscaled 1cm;  

\stopMPcode

\\

After:\\

\startMPcode

  for i=0 upto 1:

    draw unitsquare scaled 1cm xshifted i*cm;

  endfor;

\stopMPcode

\stoptext

How can a line be drawn connecting the right edges of the rectangles? I have played with:

\startuniqueMPgraphic{line}

  path a;

  a:=(0,0)--(0,3cm);

  draw a withpen pencircle scaled 3pt withcolor green;

\stopuniqueMPgraphic

\defineoverlay[line][{\uniqueMPgraphic{line}}]

and using it in \framed, but placing the line correctly is elusive.