Someone should always remember that our eyes’ movement is from left to right (that’s the way we read or “scan” things). This in practice affects product placement on a shelf, in a window display or everywhere else. Thus this can be translated into a from the left to the right line of products starting from cheap to expensive, from small to large, from light to dense texture, from red to violet (see chromatic orderliness: red-orange-yellow-green-blue-violet) and so on …