\showframe

% A test case for \vskip\zeropoint in
%
% \box\b_page_mix_collected
% \vskip\zeropoint
%
% in \page_mix_routine_balance.

\starttext
    \input ward
    \vskip160mm
    \input ward
    \blank
    \startmixedcolumns test \column test \stopmixedcolumns
    test \par
\stoptext
