[XeTeX] List of ligatures in a font

Philip TAYLOR P.Taylor at rhul.ac.uk
Thu Mar 15 13:34:49 CET 2012

Zdenek Wagner wrote:

> 2012/3/14 Peter Dyballa<Peter_Dyballa at web.de>:

>> Check the code points in the font! The statement
>>         \defaultfontfeatures{Mapping=tex-text}
>> informs the XeTeX engine to use the standard ligatures, as TeX would do by default.
> This mapping instruct XeTeX to use the TECkit mechanism to replace
> characters by ligatures in case they are not defined by GSUB tables in
> the font. It does not say anything about ligatures already present in
> the font nor does it list the contents of the GSUB tables.

Unfortunately, on a freshly-installed TeX Live 2011 with all
current updates applied, the control sequence is unknown :

%!TeX Program=XeTeX
\magnification 4000

\defaultfontfeatures {Mapping=tex-text}


This is XeTeX, Version 3.1415926-2.3-0.9997.5 (Web2C 2011)
  restricted \write18 enabled.
entering extended mode
! Undefined control sequence.
l.4 \defaultfontfeatures

Could an expert advise, please ?
Philip Taylor

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