The package provides a LaTeX interface to pdfTeX’s micro-typographic extensions: character protrusion and font expansion. The package also offers a lua interface to the corresponding features of LuaTeX.

The package allows you to restrict character protrusion and/or font expansion to a certain set of fonts, or to certain parts of the document (for example, based on selected language), and to configure micro-typographic aspects of the fonts in a straight-forward and flexible way. Settings for various fonts are provided.

The bundle also provides a letterspace package; this improves on the alternatives (letterspacing and soul), and also provides a means of protecting ligatures—notably those in fraktur fonts.

Note: Font expansion and character protrusion only work with pdfTeX and LuaTeX. For pdfTeX, at least version 0.14f is required; version 1.20a is needed for automatic font expansion. With pdfTeX version 1.30, a command is provided for suppressing ligatures.

See also pdfcprot.

The author is Robert Schlicht. The package is Copyright © 2004-2009 Robert Schlicht.