gistfile1.rb

## Controller
prawnto :prawn => {:left_margin => 0.21975.in, 
                   :right_margin => 0.21975.in}

## View
pdf.define_grid(:columns => 3, :rows => 10, :column_gutter => 10)

pdf.grid.rows.times do |i|
  pdf.grid.columns.times do |j|
    b = pdf.grid(i,j)
    pdf.bounding_box b.top_left, :width => b.width, :height => b.height do
      pdf.text b.name
      pdf.stroke do
        pdf.rectangle(pdf.bounds.top_left, b.width, b.height)
      end
    end
  end
end