PS TEXT FORMAT Reference Manual

Overview of TFORM Capabilities
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Joining Text Once you’ve established your margins, you can allow TFORM to decide
where lines should end to best fill the available space. If you tell TFORM to
join all lines automatically, you don’t have to worry about whether the lines
of text as you type them are too long or too short. You do this with the SET
command:
\SET JOIN ON
When joining is in effect, TFORM examines each line as it formats it and, if
the line is too long, TFORM breaks off one or more words and begins the
next line with them. If a line is short enough that one or more words from
the next line will fit, TFORM brings enough words up from the next line to
fill the current one. This continues until TFORM runs out of input lines to
process or finds a blank line, a page break, a mandatory line break, or a SET
command to turn joining off. This form of the SET command is:
\SET JOIN OFF
If you’re using unedited data, formatting with JOIN ON can minimize “line
too long”errors. But if you’re not careful, you may find that what you
intended to display as an indented example or as a column of words has all
been joined together in continuous lines. You can prevent this by turning
joining off at the start of the column and turning it back on again at the end,
or by telling TFORM to force a line break. To do the latter, insert a
command between each line that you don’t want joined. The BREAK
command has two forms:
\
\BREAK