Here is my Minexample
\mainlanguage [de]
\definepapersize[MyBook][A5]
\setuppapersize[MyBook][A5]
\usetypescript[times]
\setupbodyfont[times,10pt]
\setupbodyfontenvironment [default][em=italic] % use italic as em, not slanted
\setuphead[subsection][before={\blank[line]},style=bold] % Kleine subsections, besserer grid
\setuphead[section][after={\blank[line]}]
\setuplayout[grid=yes]
\showgrid
%\setupbackgrounds [header][text][frame=off,bottomframe=on]
\starttext
Last paragraph Text.....
\section{First section}
\subsection{First Subsection}
\stoptext
Now you see in the grid, that the placement is not optimal. There are three lines before and after the section. It would be better to have f.e. 3 before and 1 after, or 2 before and 1 after or aynthing like that. How to achieve that?