First and last lines on a grid

[Oliver Buerschaper <oliver.buerschaper@mpq.mpg.de>]

Dear all,

I'm having a little trouble with grids and page layout…

I'm trying to align the first and last line of a page properly with the frame of the textblock. That is, I'd like to position the first baseline a certain distance below the textblock's upper border (say, the height of a "C" or even "É") and the last baseline a certain distance above the textblock's lower border (say, the actual depth of a "g").

How would I do that? I tried playing with "\setupinterlinespace", however, its options "top" and "bottom" appear to set relative distances. Once I change the leading funny things happen… like an empty first line.

Also I'd like to typeset the page number flush with the lower border of the footer frame. How would I achieve that?

Please find the source code of my attempt below.

Oliver



---
\definemeasure
    [gridwidth]
    [\dimexpr\paperwidth/9\relax]
\definemeasure
    [gridheight]
    [\dimexpr\paperheight/9\relax]

\setuplayout
    [grid=yes,
     backspace=\measure{gridwidth},
     width=\dimexpr6\measure{gridwidth}\relax,
     topspace=\measure{gridheight},
     height=\dimexpr7\measure{gridheight}\relax,
     leftmargin=\zeropoint,
     rightmargin=\zeropoint,
     header=\zeropoint,
     footer=\measure{gridheight}]

\setupinterlinespace
    [line=\dimexpr\textheight/20\relax]

\setuppagenumbering
    [alternative=doublesided,
     location={footer,right}]


\starttext


\showframe
\showgrid

É
\dorecurse{10}{\input zapf\par}


\stoptext
---
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