Koma scrbook seems not to include BCOR

user_855443 0
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The proof copies of a book laid out with KOMA scrbook show that the inner margins are too narrow. I had BCOR set to 10mm and want to increase them, but my experiments with BCOR set to 20mm show that the layout is the same independent what BCOR value I set. Here my MWE:

\documentclass{scrbook}
\KOMAoptions{paper=      
    128.5mm:198.4mm, %(5,06" x 7,91")  %ziel
    BCOR=20mm,
    twoside,
    headinclude=false, footinclude=false, 
    headings=normal,
    titlepage=true,
    %   draft=true, 
    DIV=9,  %ziel kleines buch 
    fontsize=12pt,
 }

\usepackage[german]{babel}   
\usepackage{lipsum}
\usepackage{geometry}
\usepackage[a4,axes,cross,pdftex,center]{crop}



\begin{document}
    \frontmatter
        \tableofcontents

    \mainmatter

\part{ Philosophie}
some text 
\lipsum
\lipsum 

\end{document}

What is wrong?

My real question is: how can I just move the text area on both pages to the outside (i.e. making the gutter wider) without changing the text area size (and thus preserve line breaks)?

latex
1 Answers

I found a hint in some other questions answered before and the problem was caused by the interaction between the KOMA script and the geometry package. Using the geometry package recalculates the page layout and overwrites the one calculated by scrbook including the BCOR value. This can be avoided when adding the option pass to geometry as in 

`\usepackage[pass]{geometry}`.

In general the interaction between the layout calculated by KOMAscript and other package can lead to surprises. The discussion in https://tex.stackexchange.com/questions/182821/div-and-bcor-setting-in-koma-best-practices/183839 is very useful.

user_8554430
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