From 0c75a2acf592eb4360685375904440f5e6b8125a Mon Sep 17 00:00:00 2001
From: Hans Hagen <pragma@wxs.nl>
Date: Tue, 12 Nov 2019 19:54:50 +0100
Subject: 2019-11-12 18:53:00

---
 doc/context/sources/general/manuals/luatex/luatex-fonts.tex | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'doc/context/sources/general/manuals/luatex/luatex-fonts.tex')

diff --git a/doc/context/sources/general/manuals/luatex/luatex-fonts.tex b/doc/context/sources/general/manuals/luatex/luatex-fonts.tex
index d49c63afe..e5b6e1cb2 100644
--- a/doc/context/sources/general/manuals/luatex/luatex-fonts.tex
+++ b/doc/context/sources/general/manuals/luatex/luatex-fonts.tex
@@ -43,6 +43,7 @@ the table are as follows:
                                                                         complete control to the loader. \NC \NR
 \NC \type{fullname}         \NC no  \NC no  \NC yes  \NC string     \NC output font name, used as a fallback in the \PDF\ output
                                                                         if the \type {psname} is not set \NC \NR
+\NC \type{subfont}          \NC no  \NC no  \NC yes  \NC number     \NC default: 0, index in (\type {ttc}) font with multiple fonts \NC \NR
 \NC \type{header}           \NC yes \NC no  \NC no   \NC string     \NC header comments, if any \NC \NR
 \NC \type{hyphenchar}       \NC no  \NC no  \NC yes  \NC number     \NC default: \TEX's \prm {hyphenchar} \NC \NR
 \NC \type{parameters}       \NC no  \NC yes \NC yes  \NC hash       \NC default: 7 parameters, all zero \NC \NR
@@ -105,6 +106,11 @@ font in \type {font.fonts}. It is the actual expansion factor (a value between
 \type {-shrink} and \type {stretch}, with step \type {step}) of a font that was
 automatically generated by the font expansion algorithm.
 
+The \type {subfont} parameter can be used to specify the subfont in a \type {ttc}
+font. When given, it is used instead of the \type {psname} and \type {fullname}
+combination. The first subfont has number~1. A zero value signals using the names
+as lookup.
+
 Because we store the actual state of expansion with each glyph and don't have
 special font instances, we can change some font related parameters before lines
 are constructed, like:
-- 
cgit v1.2.3

