Ok, I've found a solution.
%
\enabletrackers[graphics.conversion]
\startluacode
local function convert(oldname, newname)
os.execute(string.format(
'gm convert "%s" "%s"', oldname, newname)
)
end
-- Set the PDF, JPEG and default TIFF converters to t
Dear List,
I just finished my example, did some changes today and it works perfect
\setuppapersize[A8,landscape]
\setuplayout[leftmargin=2.5cm,
leftmargindistance=0.2cm,
backspace=2.9cm,
width=4cm]
\margintext{\blackrule[color=black, height=0.05ex,
width=1cm]