Current File : //usr/share/texlive/texmf-dist/doc/xetex/xetexfontinfo/README

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 opentype-info & aat-info 
     By Jonathan Kew

These documents are used to reveal the various
font features supported by fonts useable in XeTeX.

Use 'opentype-info.tex' with OpenType fonts and
'aat-info.tex' with AAT fonts (Mac OS X only).

Input the font name and compile them with plain 
`xetex`; the output will be a listing of the
supported font features.

These documents are distributed under the Apache License v2: 
  <http://www.apache.org/licenses/LICENSE-2.0.html>