Dear ConTeXt folks,

having heard nice things about the KOMA script type area I wanted to use
it too and tried out the example in the Wiki [1].

        % Set binding correction value (mode=BCOR turns it on).
        \doifmodeelse{BCOR}{\def\bindingcorr{3mm}}{\def\bindingcorr{0pt}}
        
        % Set visible page width.
        \newdimen\PageWidth
        \PageWidth=\dimexpr(\paperwidth-\bindingcorr)
        
        % Determine the paper aspect ratio.
        \edef\Ratio{\withoutpt{\the\dimexpr(2\paperheight/(\PageWidth/32768))}}
        
        % Set the textarea width to 2.6 alphabets.
        \setbox\scratchbox\hbox{\dorecurse{26}{\character\recurselevel}}
        \newdimen\Width \Width=\dimexpr(2.6\wd\scratchbox)
        
        % Set the textarea height proportional to the width.
        \newdimen\Height \Height=\dimexpr(\Ratio\Width)
        
        % Set the margin/gutter widths to be equal on a full spread.
        \newdimen\Back
        \doifmodeelse{oneside}
            {\Back=\dimexpr(((\PageWidth - \Width) / 2) + \bindingcorr)}
            {\Back=\dimexpr(((\PageWidth - \Width) / 3) + \bindingcorr)}
        
        % Set the top and bottom margins in a 1:2 ratio, ignoring headers.
        \edef\Top{\the\dimexpr((\paperheight - \Height) / 3 - 3\lineheight)}
        
        % Redefine \Height to include header and footer space.
        \Height=\dimexpr(\Height + 8\lineheight)
        
        % Set up the page layout using the calculated parameters.
        \setuplayout[
             backspace=\the\Back,
             height=\the\Height,
             width=\the\Width,
             header=2\lineheight,
             headerdistance=\lineheight,
             footer=2\lineheight,
             footerdistance=3\lineheight,
             topspace=\Top]
        
        \starttext
        \framed[width=\textwidth,height=\textheight]{}
        \stoptext

I only want to add a page number to the footer [3] and I do not want to
use any header [2, and ConTeXt manual]. Therefore I set

        \setupheader[][state=none]
        \setuppagenumbering[alternative=doublesided, location={footer}]
        \enablemode[BCOR]

According to the KOMA-Script manual [4] having just a page number in the
footer it should be counted as belonging to the margin. The only way I
found out to achieve that was setting `\footdistance=0`.

Is that the “correct” way to comply with the KOMA-Script type area
recommendation?

Please find the adapted example attached.


Thanks,

Paul


[1] http://wiki.contextgarden.net/KOMA-scrartcl_Type_Area
[2] http://wiki.contextgarden.net/Layout
[3] http://wiki.contextgarden.net/Reference/en/setuppagenumbering
[4] ftp://ftp.dante.de/pub/tex/macros/latex/.../koma-script/scrguide.pdf

Attachment: koma.pdf
Description: Adobe PDF document

% Set binding correction value (mode=BCOR turns it on).
\doifmodeelse{BCOR}{\def\bindingcorr{5mm}}{\def\bindingcorr{0pt}}

% Set visible page width.
\newdimen\PageWidth
\PageWidth=\dimexpr(\paperwidth-\bindingcorr)

% Determine the paper aspect ratio.
\edef\Ratio{\withoutpt{\the\dimexpr(2\paperheight/(\PageWidth/32768))}}

% Set the textarea width to 2.6 alphabets.
\setbox\scratchbox\hbox{\dorecurse{26}{\character\recurselevel}}
\newdimen\Width \Width=\dimexpr(2.6\wd\scratchbox)

% Set the textarea height proportional to the width.
\newdimen\Height \Height=\dimexpr(\Ratio\Width)

% Set the margin/gutter widths to be equal on a full spread.
\newdimen\Back
\doifmodeelse{oneside}
    {\Back=\dimexpr(((\PageWidth - \Width) / 2) + \bindingcorr)}
    {\Back=\dimexpr(((\PageWidth - \Width) / 3) + \bindingcorr)}

% Set the top and bottom margins in a 1:2 ratio, ignoring headers.
\edef\Top{\the\dimexpr((\paperheight - \Height) / 3 - 3\lineheight)}

% Redefine \Height to include header and footer space.
\Height=\dimexpr(\Height + 8\lineheight)

% Set up the page layout using the calculated parameters.
\setuplayout[
     backspace=\the\Back,
     height=\the\Height,
     width=\the\Width,
     header=2\lineheight,
     headerdistance=\lineheight,
     footer=2\lineheight,
     footerdistance=0\lineheight,
     topspace=\Top,
     ]

\setupheader[][state=none]

\setuppagenumbering[alternative=doublesided, location={footer}]
\enablemode[BCOR]
\starttext
\framed[width=\textwidth,height=\textheight]{}

\input tufte
\stoptext

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Description: This is a digitally signed message part

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