--help displays a usage message, while -v and --version show
version information; all exit afterward.
-c Be more compatible with tpic. Implies -t. Lines
beginning with \ are not passed through transparently.
Lines beginning with . are passed through with the
initial . changed to \. A line beginning with .ps is
given special treatment: it takes an optional integer
argument specifying the line thickness (pen size) in
milliinches; a missing argument restores the previous line
thickness; the default line thickness is 8 milliinches.
The line thickness thus specified takes effect only when a
non-negative line thickness has not been specified by use
of the thickness attribute or by setting the linethick
variable.
-C Recognize .PS, .PE, and .PF even when followed by a
character other than space or newline.
-n Don't use groff extensions to the troff drawing commands.
You should use this if you are using a postprocessor that
doesn't support these extensions. The extensions are
described in groff_out(5). The -n option also causes pic
not to use zero-length lines to draw dots in troff mode.
-S Safer mode; do not execute sh commands. This option,
enabled by default, can be useful when operating on
untrustworthy input.
-t TeX mode.
-U Unsafe mode; revert the default option -S.
-z In TeX mode draw dots using zero-length lines.
The following options supported by other versions of pic are
ignored:
-D Draw all lines using the \D escape sequence. pic always
does this.
-T dev Generate output for the troff device dev. This is
unnecessary because the troff output generated by pic is
device-independent.
