# File lib/spreadsheet/excel/writer/n_worksheet.rb, line 847
  def write_wsbool
    bits = [
         #   Bit  Mask    Contents
      1, #     0  0x0001  0 = Do not show automatic page breaks
         #                1 = Show automatic page breaks
      0, #     4  0x0010  0 = Standard sheet
         #                1 = Dialogue sheet (BIFF5-BIFF8)
      0, #     5  0x0020  0 = No automatic styles in outlines
         #                1 = Apply automatic styles to outlines
      1, #     6  0x0040  0 = Outline buttons above outline group
         #                1 = Outline buttons below outline group
      1, #     7  0x0080  0 = Outline buttons left of outline group
         #                1 = Outline buttons right of outline group
      0, #     8  0x0100  0 = Scale printout in percent (➜ 6.89)
         #                1 = Fit printout to number of pages (➜ 6.89)
      0, #     9  0x0200  0 = Save external linked values
         #                    (BIFF3-BIFF4 only, ➜ 5.10)
         #                1 = Do not save external linked values
         #                    (BIFF3-BIFF4 only, ➜ 5.10)
      1, #    10  0x0400  0 = Do not show row outline symbols
         #                1 = Show row outline symbols
      0, #    11  0x0800  0 = Do not show column outline symbols
         #                1 = Show column outline symbols
      0, # 13-12  0x3000  These flags specify the arrangement of windows.
         #                They are stored in BIFF4 only.
         #                00 = Arrange windows tiled
         #                01 = Arrange windows horizontal
      0, #                10 = Arrange windows vertical
         #                11 = Arrange windows cascaded
         # The following flags are valid for BIFF4-BIFF8 only:
      0, #    14  0x4000  0 = Standard expression evaluation
         #                1 = Alternative expression evaluation
      0, #    15  0x8000  0 = Standard formula entries
         #                1 = Alternative formula entries
    ]
    weights = [4,5,6,7,8,9,10,11,12,13,14,15]
    value = bits.inject do |a, b| a | (b << weights.shift) end
    write_op 0x0081, [value].pack('v')
  end