Vjylku

I want to add a small icon right left of the Subject line in a scrlttr2 file.
I already managed this for a scrartcl file, but don't now how to do this in a letter.
Can you help me?

The code from the scrartcl.cls is:

newcommand{unquad}{hskip-1.3emrelax}

DeclareRobustCommand{picturetodisplay}{includegraphics{Bilder/Spiel_Start.jpg}} 

makeatletter

def@seccntformat#1{unquadunquadpicturetodisplayquad}

makeatother

Does anyone know, how the reference for the subject is called in scrlttr2?

MWE

documentclass[a4paper, fontsize=10pt, DIV 14]{scrlttr2}

KOMAoptions{%

    locfield=wide, %

    fromalign=left,%

    fontsize=10pt, %

    parskip=half   %

}

LoadLetterOption{DINmtext}



usepackage[utf8]{inputenc} 

usepackage[ngerman]{babel} 

usepackage[T1]{fontenc}

usepackage[scaled=.92]{helvet}



%------------------- It's all about this part -----------------------

newcommand{unquad}{hskip-1.3emrelax}

DeclareRobustCommand{picturetodisplay}{includegraphics{Bilder/Spiel_Start.jpg}} % This is the icon I want to use

makeatletter

def@seccntformat#1{unquadunquadpicturetodisplayquad}

makeatother

%-------------------------------------------------------------------



usepackage{blindtext}





setkomavar{subject}{$leftarrow$ There should appear the icon glqq Spiel_Start.jpggrqq{}}

begin{document}

    setkomavar{fromname}{Me}

    begin{letter}{Jon Doe}

    opening{Hey,}

    blindtext





    closing{Thank You. Over and out}



    end{letter}



end{document}

The hacked scrartcl sections look like this:

Thank you
Michael

You can simply add includegraphics[width=1cm]{example-image-a} at the point where you want to get the icon. Because I do not have your used image I simply used image example-image-a.jpg frpm package MWE (which must be installed but not called!).

See the complete code (I deleted your code of the code snippet because it is not needed/used here):

documentclass[a4paper, fontsize=10pt, DIV 14]{scrlttr2}

KOMAoptions{%

    locfield=wide, %

    fromalign=left,%

    fontsize=10pt, %

    parskip=half   %

}

LoadLetterOption{DINmtext}



usepackage[utf8]{inputenc} 

usepackage[ngerman]{babel} 

usepackage[T1]{fontenc}

usepackage[scaled=.92]{helvet}

usepackage{graphicx}



usepackage{blindtext}



setkomavar{subject}{includegraphics[width=1cm]{example-image-a}$leftarrow$ There should appear the icon glqq Spiel_Start.jpggrqq{}}





begin{document}

    setkomavar{fromname}{Me}

    begin{letter}{Jon Doe}

    opening{Hey,}

    blindtext





    closing{Thank You. Over and out}



    end{letter}



end{document}

and the resulting pdf:

You could use variable subjectseparator:

documentclass[a4paper, fontsize=10pt, DIV=14]{scrlttr2}% <- syntax changed: DIV=14

KOMAoptions{%

    locfield=wide, %

    fromalign=left,%

    fontsize=10pt,%

    parskip=half,%

    subject=titled % <- added

}

LoadLetterOption{DINmtext}



usepackage[utf8]{inputenc} 

usepackage[ngerman]{babel} 

usepackage[T1]{fontenc}

usepackage[scaled=.92]{helvet}

usepackage{graphicx}



usepackage{blindtext}



setkomavar{subject}{$leftarrow$ There should appear the icon glqq Spiel_Start.jpggrqq{}}

setkomavar{subjectseparator}[]{makebox[0pt][r]{includegraphics[width=1.5em]{example-image}enskip}}% <- added





begin{document}

setkomavar{fromname}{Me}

begin{letter}{Jon Doe}

opening{Hey,}

blindtext

closing{Thank You. Over and out}

end{letter}

end{document}

Result:

Additional remark regarding your scrartcl hack: if you use a KOMA-Script class, avoid the redefinition of an internal command. You could redefine sectionlinesformat or maybe sectionformat (depending on the desired result).