The package displays all kerning values in the form of colored bars directly at the respective position in the document. Positive values are displayed in green, negative values in red. The width of the bars corresponds exactly to the respective kerning value. By option the bars can be placed behind or in front of the glyphs. The package requires LuaLaTeX. Copyright (c) 2022-2023 Thomas Kelkel kelkel@emaileon.de The files of this package may be distributed and/or modified under the conditions of the LaTeX Project Public License, either version 1.3c of this license or (at your option) any later version. The latest version of this license is in http://www.latex-project.org/lppl.txt and version 1.3c or later is part of all distributions of LaTeX version 2009/09/24 or later.