def store_plotgrowth  # :nodoc:
    record  = 0x1064         # Record identifier.
    length  = 0x0008         # Number of bytes to follow.
    dx_plot = 0x00010000     # Horz growth for font scale.
    dy_plot = 0x00010000     # Vert growth for font scale.

    header = [record, length].pack('vv')
    data  = [dx_plot].pack('V')
    data += [dy_plot].pack('V')

    append(header, data)
  end
def store_plotgrowth  # :nodoc:
    record  = 0x1064         # Record identifier.
    length  = 0x0008         # Number of bytes to follow.
    dx_plot = 0x00010000     # Horz growth for font scale.
    dy_plot = 0x00010000     # Vert growth for font scale.

    header = [record, length].pack('vv')
    data  = [dx_plot].pack('V')
    data += [dy_plot].pack('V')

    append(header, data)
  end
Write the PLOTGROWTH chart BIFF record.