Flip the page in landscape mode

[BHARAT SHAH]

Whomever:

I print 3 pages per sheet and double sided. Currently bound is on the left
side and unable to flip the pages.
I would like to have bound on the top so that I can use three hole punch and
flip the pages.

Would please tell me which options do I need for that?

My current settings are as follows:

                       Configuration status of a2ps 4.1
                       ================================

Sheets:
-------
  medium          = Letter, landscape
  page layout     = 3 x 1, rows first
  borders         = yes
  file alignment  = sheet
  interior margin = 0

Virtual pages:
--------------
  number lines         = each 5 lines
  format               = 80 characters per line
  tabulation size      = 4
  non printable format = caret (i.e., `^C', `M-^C' etc.

Headers:
--------
  header       = %a
  left footer  = %e
  footer       = $f
  right footer = #?l!%s./%s#!#?v|%s./%s#|%E|!
  left title   = #?2||$e $T|
  center title = #?1|$t1|$n|
  right title  = #?2|$t2|$Q|
  under lay    = 

Input:
------
  truncate lines = no
  interpret      = yes
  end of line    = any type
  encoding       = ISO-8859-1
  document title = #10!f|$n|, |
  prologue       = bw
  print anyway   = no
  delegating     = yes

Pretty-printing:
----------------
  style sheet     = selected automatically
  highlight level = heavy
  strip level     = 0

Output:
-------
  destination     = sent to the printer `petprn13'
  version control = numbered backups of files already n
                            and simple of others
  backup suffix   = ~

PostScript:
-----------
  magic number              = %!PS-Adobe-3.0
  Printer Description (PPD) = selected automatically
  default PPD               = level1
  page label format         = #{pl.short}
  number of copies          = 1
  sides per sheet           = DuplexTumble
  page device definitions   = Tumble:true Duplex:true 
  statusdict definitions    = 
  page prefeed              = no

Internals:
----------
  verbosity level     = 2
  file command        = /bin/file
  temporary directory = /tmp
  library path        = 
        /home/bshah/.a2ps
        /usr/local/share/a2ps/sheets
        /usr/local/share/a2ps/ps
        /usr/local/share/a2ps/encoding
        /usr/local/share/a2ps/afm
        /usr/local/share/ogonkify/afm
        /usr/local/share/a2ps/ppd
        /usr/local/share/a2ps/fonts
        /usr/local/share/ogonkify/fonts
        /usr/local/share/a2ps

I would appreciate your help in this matter.

Thanks.

Bharat