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I'm a bit confused about how to specify vertical whitespace. The following document works:

\setupwhitespace[line]
\setuphead[subsection]   [after={\blank[2*line]}]

\starttext

\subsection{Title}

\input tufte

\input tufte

\stoptext

But why can't I use \setupwhitespace[2*line], and neither \blank[0.5*line]? Both result in an error. Meanwhile, \setupwhitespace[5cm] doesn't seem to have an effect.

What I'm actually trying to achieve is having the vertical spacing between paragraphs (and subsections) 0.5*line, or if that's not possible some specific centimeters.

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  • 2
    \setupwhitespace[halfline], also see \installwhitespacemethod. – Philipp Gesang Aug 17 '13 at 16:43
  • Thanks, halfline works. But what about, say 0.1*line? Pasting \installwhitespacemethod \v!pointoneline {\s_spac_whitespace_parskip.1\baselineskip} gives an error. – mb21 Aug 17 '13 at 19:49
  • 2
    Enclose the installwhitespace line in \starttexcode … \stoptexcode and replace \v!pointoneline with {pointoneline}. – Marco Aug 17 '13 at 23:27
  • okay, seems I'm starting to figure it out (feel free to edit my answer below). So the only missing case would be: 0.1*line spacing after a subsection. Is that possible as well? – mb21 Aug 18 '13 at 7:26
  • \setuphead[section][style=\tfc, before={\blank[line]}, after={\blank[none]}] – mb21 Feb 2 '14 at 15:05
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A clean way, which doesn't require low level TeX is to use the measure mechanism. A dimension is defined using \definemeasure, the value can be retrieved with \measure.

\definemeasure
  [pointoneline]
  [.5\baselineskip]

\setupwhitespace
  [\measure{pointoneline}]

\setuphead
  [subsection]
  [after={\blank[\measure{pointoneline}]}]

\starttext
  \startsubsection [title=Title]
    \input knuth
  \stopsubsection
\stoptext

result

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