col(1)                     DG/UX 4.30                      col(1)



     NAME
          col - filter reverse line-feeds

     SYNOPSIS
          col [ -bfpx ]

     DESCRIPTION
          Col reads from the standard input and writes onto the
          standard output.  It performs the line overlays implied by
          reverse line feeds (ASCII code ESC-7), and by forward and
          reverse half-line feeds (ESC-9 and ESC-8).  Col is
          particularly useful for filtering multicolumn output made
          with the .rt command of nroff and output resulting from the
          tbl(1) preprocessor.

          Options are:

          -b      No backspacing.  If two or more characters are to
                  appear in the same place, only the last one read
                  will be output.

          -f      Fine-adjust half-line motions.  Although col accepts
                  half-line forward motions in its input, it outputs
                  them as full-line motions  unless you specify -f.
                  Reverse half-line motions (and all other reverse
                  line motions) are still ignored.

          -x      Do not convert white space to tabs on output.
                  Normally col converts blank areas to tab sequences.

          -p      Output escape sequences as regular characters.
                  Without this option, col will ignore any unknown
                  escape sequences found in its input. Don't use this
                  option unless you know the textual position of the
                  escape sequences.

          Col assumes that the ASCII control characters SO (\016) and
          SI (\017) start and end text in an alternate character set.
          The character set to which each input character belongs is
          remembered, and on output SI and SO characters are generated
          to ensure that each character is printed in the correct set.

          On input, the only control characters accepted are space,
          backspace, tab, return, new-line, SI, SO, VT (\013), and ESC
          followed by 7, 8, or 9.  The VT character is an alternate
          form of full reverse line-feed, included for compatibility
          with some earlier programs of this type.  All other non-
          printing characters are ignored.

     SEE ALSO
          nroff(1), tbl(1).  Using the Documenter's Tool Kit on the
          DG/UX System. Documenter's Tool Kit Technical Summary for



     Licensed material--property of copyright holder(s)         Page 1

     col(1)                     DG/UX 4.30                      col(1)



          the DG/UX System.

     NOTES
          The input format accepted by col matches the output produced
          by nroff with the -Tlp option.  The -T37 switch is not
          implemented in DG/UX.

     BUGS
          Col cannot back up more than 128 lines.

          It allows at most 800 characters, including backspaces, on a
          line.

          Local vertical motions that would result in backing up over
          the first line of the document are ignored.  As a result,
          the first line must not have any superscripts.







































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