The LuaTeX package lua-visual-debug shows boxes, glues, kerns and penalties in the PDF output.
Usage:
LaTeX:
\usepackage{lua-visual-debug}
or plain:
\input lua-visual-debug.sty
or OpTeX:
\load[lua-visual-debug]
Requirements: The package has only been tested with LuaTeX and the formats plain and LaTeX. Other formats might work as well, but other engines only show a warning message.
Copyright 2012–2025 Patrick Gundlach (patrick@gundla.ch) and others (see Git information)
Package version: 2025-12-29 v1.0
Public repository: https://github.com/Udi-Fogiel/lvdebug
Licensed under the MIT license. See the Lua file for details.
The idea is heavily inspired by Hans Hagen's https://www.pragma-ade.com/articles/art-visi.pdf
