implement font modifiers in table layouts

1 files changed, 23 insertions, 22 deletions

diff --git a/tbl.7 b/tbl.7
index b1bcb1b9..5157f1bb 100644
--- a/tbl.7
+++ b/tbl.7
@@ -1,6 +1,7 @@
 .\"	$Id$
 .\"
 .\" Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+.\" Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
 .\" purpose with or without fee is hereby granted, provided that the above
@@ -195,7 +196,7 @@ Each layout line corresponds to a line of data; the last layout line
 applies to all remaining data lines.
 Layout lines may also be separated by a comma.
 Each layout cell consists of one of the following case-insensitive keys:
-.Bl -tag -width Ds
+.Bl -tag -width 2n
 .It Cm c
 Centre a literal string within its column.
 .It Cm r
@@ -244,35 +245,35 @@ Keys may be followed by a set of modifiers.
 A modifier is either a modifier key or a natural number for specifying
 the minimum width of a column.
 The following case-insensitive modifier keys are available:
-.Cm z ,
-.Cm u ,
-.Cm e ,
-.Cm t ,
+.Bl -tag -width 2n
+.It Cm b
+Use a bold font for the contents of this column.
+.It Cm f
+The next character selects the font to use for this column.
+See the
+.Xr roff 7
+manual for supported one-character font names.
+.It Cm i
+Use an italic font for the contents of this column.
+.El
+.Pp
+The modifiers
 .Cm d ,
-.Cm b ,
-.Cm i ,
+.Cm e ,
 .Cm r ,
+.Cm t ,
+.Cm u ,
 and
-.Cm f
-.Po
-followed by
-.Cm b ,
-.Cm i ,
-.Cm r ,
-.Cm 3 ,
-.Cm 2 ,
-or
-.Cm 1
-.Pc .
-All of these are ignored by
+.Cm z
+are ignored by
 .Xr mandoc 1 .
 .Pp
 For example, the following layout specifies a centre-justified column of
 minimum width 10, followed by vertical bar, followed by a left-justified
-column of minimum width 10, another vertical bar, then a column
-justified about the decimal point in numbers:
+column of minimum width 10, another vertical bar, then a column using
+bold font justified about the decimal point in numbers:
 .Pp
-.Dl c10 | l10 | n
+.Dl c10 | l10 | nfB
 .Ss Data
 The data section follows the last layout row.
 By default, cells in a data section are delimited by a tab.