GNU groff version 1.22.3 Copyright (C) 2014 Free Software Foundation, Inc. GNU groff comes with ABSOLUTELY NO WARRANTY. You may redistribute copies of groff and its subprograms under the terms of the GNU General Public License. For more information about these matters, see the file named COPYING. called subprograms: GNU troff (groff) version 1.22.3 GNU grops (groff) version 1.22.3

usage: groff [-abceghijklpstvzCEGNRSUVXZ] [-dcs] [-ffam] [-mname] [-nnum] [-olist] [-rcn] [-wname] [-Darg] [-Fdir] [-Idir] [-Karg] [-Larg] [-Mdir] [-Parg] [-Tdev] [-Wname] [files...] -h print this message -v print version number -e preprocess with eqn -g preprocess with grn -j preprocess with chem -k preprocess with preconv -p preprocess with pic -s preprocess with soelim -t preprocess with tbl -G preprocess with grap -J preprocess with gideal -R preprocess with refer -a produce ASCII description of output -b print backtraces with errors or warnings -c disable color output -dcs define a string c as s -ffam use fam as the default font family -i read standard input after named input files -l spool the output -mname read macros tmac.name -nnum number first page n -olist output only pages in list -rcn define a number register c as n -wname enable warning name -z suppress formatted output -C enable compatibility mode -Darg use arg as default input encoding. Implies -k -E inhibit all errors -Fdir search dir for device directories -Idir search dir for soelim, troff, and grops. Implies -s -Karg use arg as input encoding. Implies -k -Larg pass arg to the spooler -Mdir search dir for macro files -N don't allow newlines within eqn delimiters -Parg pass arg to the postprocessor -S enable safer mode (the default) -Tdev use device dev -U enable unsafe mode -V print commands on stdout instead of running them -Wname inhibit warning name -X use X11 previewer rather than usual postprocessor -Z don't postprocess