The GNU troff Manual

Table of Contents

GNU troff

This manual documents GNU troff version 1.25.0.rc1.

Copyright © 1994–2026 Free Software Foundation, Inc.
Copyright © 2018–2026 G. Branden Robinson

This document is dual-licensed. You may distribute and/or modify it under the terms of either or both of the following licenses.¹

• GNU GPLv3:

  This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. A copy of the license is included in the section entitled “GNU General Public License”.

  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

• GNU FDLv1.3:

  Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License”.