Visualize scrlttr2 layout

Question

I made some layout changes to the scrlttr2 class by changing some of the lengths that determine where the elements are put. Is there a way to generate something like this figure from the manual with the layout changes I made to get a better overview of the new layout?

I am mostly interested in the gray boxes, not so much in the arrows and labels.

Answer 1

Add the following to your preamble to visualize boxes that are normally of interest while designing a letter layout (changing lengths).

\LoadLetterOption{visualize}
\showfields{head,address,location,refline,foot}

According to the manual, this are all boxes (+test showing a 10 x 15 cm rectangle for print calibration) that can be shown this way. One needs to go a different way to visualize the rest of the gray boxes shown in your figure above.

A complete MWE:

\documentclass[backaddress=plain]{scrlttr2}

\usepackage[main=ngerman]{babel}
\usepackage{blindtext}

% change some lengths ------------------------------------------
\makeatletter
% Text block
\areaset{160mm}{237mm}
\setlength{\oddsidemargin}{\dimexpr 30mm-1in}
\setlength{\evensidemargin}{\dimexpr 20mm-1in}

% Letter Head
\@setplength{firstheadhpos}{30mm}
\@setplength{firstheadvpos}{17mm}
\@setplength{firstheadwidth}{\textwidth}

% Address Window
\@setplength{toaddrhpos}{30mm}
\@setplength{toaddrvpos}{45mm}
\@setplength{toaddrwidth}{75mm}
\@setplength{toaddrheight}{45mm}
\@setplength{toaddrindent}{0mm}
\makeatother

% visualize border of boxes in blue ----------------------------
\LoadLetterOption{visualize}
\showfields{head,address,location,refline,foot}
\setkomafont{field}{\color{blue}}
%---------------------------------------------------------------


\begin{document}

\setkomavar{fromname}{Max Mustermann}
\setkomavar{fromaddress}{Musterstr. 12\\34567 Musterstadt}

\begin{letter}{Dr. Moritz Busch\\Georgengarten\\30167 Hannover}
\opening{Mein lieber Freund,}
\blindtext
\par
\blindtext
\closing{Bis bald,}
\end{letter}

\end{document}