This is perhaps the companion question to Adding text immediately after the main text of a scrlttr2 letter.
I have a use case where I want to make a comment on a letter before actually starting the salutation (e.g. Dear...). I'd like it to look like a normal paragraph, but it doesn't matter if it doesn't have an indentation.
In this case, it's a short comment on the letter's addressee.
So, this naturally comes after the subject, and before the \opening. Does scrlttr2 provide any support for this? I could not find anything.
I tried adding some text after \begin{letter} and before \opening, but it just ended up in the middle of the address. I also looked through the KOMA-Script documentation, but did not find anything relevant.
MWE follows:
\RequirePackage{iftex}
\RequireLuaTeX
\documentclass[12pt]{scrlttr2}
\usepackage{fontspec}
\setmainfont[Scale=0.93]{TeX Gyre Schola}
\begin{document}
\setkomavar{fromname}{Harry Potter}
\setkomavar{fromaddress}{The Cupboard under the Stairs\\ 4 Privet Drive\\ Little Whinging, Surrey}
\setkomavar{firsthead}{%
{\fontspec{TeX Gyre Chorus}
\usekomavar{fromname}\\
\usekomavar{fromaddress}\\
}
}%
\def\today{3rd December, 1999}
\begin{letter}{Ronald Weasley\\The Burrow\\
Ottery St Catchpole, Devon,\\
West Country, England}
(I am sending this letter via regular mail, not owl.)% Comment to be placed between subject and opening.
\opening{Dear Ron,}
Looking forward to my visit!
\closing{Yours,}
\end{letter}
\end{document}


\openingthis code:\llap{\begin{picture}(0,0) \put(0,147){ \emph{My comment}} \end{picture}}– Keks Dose Nov 30 '21 at 09:32\setkomavar{subject}{Subject\par\normalfont\normalsize\normalcolor Comment}. This works even if you use optionsubject=titled. – esdd Nov 30 '21 at 10:23