===================================================================
RCS file: /cvs/mandoc/roff.7,v
retrieving revision 1.50
retrieving revision 1.51
diff -u -p -r1.50 -r1.51
--- mandoc/roff.7	2014/03/30 19:47:48	1.50
+++ mandoc/roff.7	2014/03/30 21:28:01	1.51
@@ -1,4 +1,4 @@
-.\"	$Id: roff.7,v 1.50 2014/03/30 19:47:48 schwarze Exp $
+.\"	$Id: roff.7,v 1.51 2014/03/30 21:28:01 schwarze Exp $
 .\"
 .\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -878,12 +878,14 @@ request are discarded.
 Change the output line length.
 Its syntax is as follows:
 .Pp
-.D1 Pf . Cm \&ll Op Ar width
+.D1 Pf . Cm \&ll Op Oo +|- Oc Ns Ar width
 .Pp
 If the
 .Ar width
 argument is omitted, the line length is reset to its previous value.
 The default setting for terminal output is 78n.
+If a sign is given, the line length is added to or subtracted from;
+otherwise, it is set to the provided value.
 Using this request in new manuals is discouraged for several reasons,
 among others because it overrides the
 .Xr mandoc 1