Am 24.02.2013 um 16:36 schrieb "Meer, H. van der" <H.vanderMeer@uva.nl>:

The contextrefmanual tells me in table 3.2 the following on the behaviour of the variables denoting the width of texts:

<Untitled.jpg>

But the claim that \textwidth gives the width of a column is false. See the following minimal example, the first picture is set with 0.45\makeupwidth, the second with 0.9\textwidth.
It is clear that \textwidth does not follow the claim.

There is a local setting for the text width missing in the mliv version of the code.

% page-mul.mkiv

\unexpanded\def\page_mul_command_set_hsize % beware, this one is available for use in macros
 {\setbox\scratchbox\hbox{\page_mul_between_columns}%
  \d_page_mul_distance\wd\scratchbox
  \d_page_mul_available_width\dimexpr
     \makeupwidth
    -\d_page_mul_leftskip
    -\d_page_mul_rightskip
    -\nofcolumns\d_page_mul_distance
    +\d_page_mul_distance
  \relax
  \d_page_mul_used_width\dimexpr
     \d_page_mul_available_width/\nofcolumns
    -\d_page_mul_offset*\plustwo
  \relax
+  \textwidth\d_page_mul_used_width
  \hsize\d_page_mul_used_width}

% page-mix.mkiv

\unexpanded\def\page_mix_command_set_hsize
- {\hsize\d_page_mix_column_width}
+ {\textwidth\d_page_mix_column_width
+  \hsize\d_page_mix_column_width}

Wolfgang
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