Dear Juan, although I am unlikely to need these special underline capabilities, thank you for this. I have used the ~soul~ package in the past for highlighting, adding @...@ as an emphasis character.
In any case, I in particular like how you define a complex LaTeX header entry using noweb! Definitely more elegant than prepending manually ~#+LATEX_HEADER~ to every line. -- : Eric S Fraga via Emacs 28.0.60, Org release_9.5-149-g781080 : Latest paper written in org: https://arxiv.org/abs/2106.05096
