def write_font(font)
      caption = font[:_caption]
      face    = 'Calibri'
      size    = 220
      color   = '#000000'

      attributes = [
                    ['face',  face],
                    ['size',  size],
                    ['color', color]
                   ]
      @writer.data_element('font', caption, attributes)
    end
def write_font(font)
      caption = font[:_caption]
      face    = 'Calibri'
      size    = 220
      color   = '#000000'

      attributes = [
                    ['face',  face],
                    ['size',  size],
                    ['color', color]
                   ]
      @writer.data_element('font', caption, attributes)
    end
Write the <font> element.