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\section{Custom font features}
-Pre-2016, it was possible to load an OpenType font feature file to define new OpenType features for a selected font. This facility was particularly useful to implement custom substitutions, for example. As of \TeX{}Live~2016, \LuaTeX/\pkg{luaotfload} no longer supports this feature, but provides its own internal mechanisms for an equivalent interface.
+\LuaTeX, via the \pkg{luaotfload} package, allows the definition and re-definition of custom OpenType features for a selected font. This facility is particularly useful to implement custom substitutions or to disable unwanted but not all ligatures.
+Figure~\ref{fig:featurefile} shows an minimal example of this type of functionality.
+
+A third-party collection of additional examples are maintained in the repository `\texttt{fonts-in-luatex}'\footnote{\url{https://github.com/mewtant/fonts-in-luatex}}.
+These examples are intended to correct or adjust font features in a range of commercial fonts and provide a good introduction to some of the possibilities that \LuaTeX\ affords.
-Any documents using `feature file' options will need to transition to the new interface.
-Figure~\ref{fig:featurefile} shows an example.
Please refer to the \LuaTeX/\pkg{luaotfload} documentation for more details.
\begin{figure}