\setuplayout
  [
   backspace=37mm,
   width=136mm,
   topspace=12mm,
   height=273mm,
   margindistance=5mm,
   leftmargin=20mm,
   rightmargin=20mm,
   edgedistance=2mm,
   leftedge=5mm,
   rightedge=5mm,
   headerdistance=5mm,
   header=10mm,
   footerdistance=5mm,
   footer=10mm,
   topdistance=2mm,
   top=5mm,
   bottomdistance=2mm,
   bottom=5mm,
   grid=no,
  ]





\setuppapersize[A4]