setupalign and flushbottom

[Alexey Kryukov <anagnost@yandex.ru>]

Dear list,

according to the wiki and the ConTeXt manual, the ConTeXt equivalent
for the LaTeX \flushbottom command is \setupalign[line]. However in my
tests this setting doesn't have the desired effect. For example:

\setuplayout[height=720pt]
\setuphead[subject][before={\vskip4pt plus 1fil},after={\blank[small]}]
\setupalign[line]
\showgrid

\starttext
\dorecurse{3}{\input knuth}

\subject{My Subject}

\dorecurse{8}{\input knuth}
\stoptext

Here at the first page there is a small gap between the last line and
the page border, although the glue above the heading can safely be
expanded to make the page filled. However I do get the desired result if
I replace \setupalign [line] with a low-level command (\alignbottom).

So what is the correct way to get pages bottom-aligned in MKIV?

-- 
Regards,
Alexey Kryukov <anagnost at yandex dot ru>

Moscow State University
Faculty of History
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