450(1)               INTERACTIVE UNIX System               450(1)



          NAME
               450 - handle special functions of the DASI 450 terminal

          SYNOPSIS
               450

          DESCRIPTION
               The 450 command supports special functions of, and optimizes
               the use of, the DASI 450 terminal, or any terminal that is
               functionally identical, such as the Diablo 1620 or Xerox
               1700.  It converts half-line forward, half-line reverse, and
               full-line reverse motions to the correct vertical motions.
               It also attempts to draw Greek letters and other special
               symbols in the same manner as 300(1).  It should be noted
               that, unless your system contains DOCUMENTER'S WORKBENCH
               Software, certain commands (e.g., eqn, nroff, tbl, etc.)
               will not work.  Use 450 to print equations neatly, in the
               sequence:

                    neqn file ... | nroff | 450

               WARNING:  Make sure that the PLOT switch on your terminal is
               ON before 450 is used.  The SPACING switch should be put in
               the desired position (either 10- or 12-pitch).  In either
               case, vertical spacing is 6 lines/inch, unless dynamically
               changed to 8 lines per inch by an appropriate escape
               sequence.

               Use 450 with the nroff -s flag or .rd requests when it is
               necessary to insert paper manually or change fonts in the
               middle of a document.  Instead of hitting the return key in
               these cases, you must use the line-feed key to get any
               response.

               In many (but not all) cases, the use of 450 can be elim-
               inated in favor of one of the following:

                    nroff -T450 files ...
               or
                    nroff -T450-12 files ...

               The use of 450 can thus often be avoided unless special
               delays or options are required; in a few cases, however, the
               additional movement optimization of 450 may produce better
               aligned output.

          SEE ALSO
               300(1), mesg(1), stty(1), tabs(1), graph(1G), tplot(1G).

          BUGS
               Some special characters cannot be correctly printed in
               column 1 because the print head cannot be moved to the left
               from there.


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          450(1)               INTERACTIVE UNIX System               450(1)



               If your output contains Greek and/or reverse line-feeds, use
               a friction-feed platen instead of a forms tractor; although
               good enough for drafts, the latter has a tendency to slip
               when reversing direction, distorting Greek characters and
               misaligning the first line of text after one or more reverse
               line-feeds.

          NOTE
               troff(1), nroff(1), and eqn(1) are not part of this UNIX
               system release.













































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