(This appears to be the same issue which was raised by Alexandros
Frantzis in October 2008; see the thread at http://www.mail-archive.com/ntg-context%40ntg.nl/msg32125.html.
No resolution was proposed at that time, and the problem still
exists.)
Extra whitespace occurs before itemizations and tabulations (and
quite possibly other structures) which appear immediately following
an in-margin heading. The following example illustrates this.
\setuplayout [backspace=7cm,leftmargin=6cm]
\setuphead [chapter][]
\setuphead [subsection]
[alternative=normal,command=,distance=1em]
\setuphead [subsubsection]
[alternative=normal,command=,distance=1em]
\setuphead [section][distance=0pt,
alternative=text,
command=\MarginHead]
\define[2]\MarginHead{\inmargin{#1 #2}}
\startbuffer[Item]
\startitemize
\item Item
\item Idem
\stopitemize
\stopbuffer
\startbuffer[Table]
\starttabulate[|l|l|]
\FL\NC Entry \NC one \NC\NR
\NC Entry \NC two \NC\NR\LL
\stoptabulate
\stopbuffer
\starttext
\chapter{Itemize}
\section{No extra whitespace}
With text here there is no extra whitespace before the
itemization.
\getbuffer[Item]
\subsection{No extra whitespace}
With text here there is no extra whitespace before the
itemization.
\getbuffer[Item]
\section{Extra whitespace}
\getbuffer[Item]
With no text before the itemization there is extra space
after the heading.
\subsection{No extra whitespace}
\getbuffer[Item]
With no text before the itemization there is extra space
after the heading.
\chapter{Tabulate}
\section{No extra whitespace}
With text here there is no extra whitespace before the
table.
\getbuffer[Table]
\subsection{No extra whitespace}
With text here there is no extra whitespace before the
table.
\getbuffer[Table]
\section{Extra whitespace}
\getbuffer[Table]
With no text before the table there is extra space after
the heading.
\subsection{No extra whitespace}
\getbuffer[Table]
With no text before the table there is extra space after
the heading.
\stoptext
Is this unresolvable? Like Alexandros, I have tried many of the
options that looked appropriate, but nothing seems to work.
--
Rik Kabel