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.xx "tail" "before keyword" "keyword and after" "head"
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where .xx may be an
nroff or
troff(1B)
macro
for user-defined formatting.
Once choice for this macro is supplied in the '-mptx'
macro package.
The
before keyword and
keyword and after fields incorporate as much of the line as will fit
around the keyword when it is printed at the middle of the page.
Tail and
head, at least one of which is an empty string "",
are wrapped-around pieces small enough to fit
in the unused space at the opposite end of the line.
When original text must be discarded, '/' marks the spot.
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The following options can be applied:
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-f |
Fold upper and lower case letters for sorting.
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-t |
Prepare the output for the phototypesetter,
i.e. set the default line length to 100 characters.
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-w n |
Use the next argument,
n, as the width of the output line.
The default line length is 72 characters.
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-g n |
Use the next argument,
n, as the number of characters to allow for each gap
among the four parts of the line as finally printed.
The default gap is 3 characters.
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-o only |
Use as keywords only the words given in the only file.
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-i ignore |
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Do not use as keywords any words given in the
ignore
file.
If the -i and -o options are missing, use /usr/ucblib/eign
as the
ignore
file.
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-b break |
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Use the characters in the
break
file to separate words.
In any case, tab, newline, and space characters are always used as break characters.
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-r |
Take any leading nonblank characters of each input line to
be a reference identifier (as to a page or chapter)
separate from the text of the line.
Attach that identifier as a 5th field on each output line.
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