% reduce skip after section heading
\setaftersecskip{1pt}
\setbeforesecskip{-1em}
+ \setaftersubsecskip{1pt}
+ \setbeforesubsecskip{-1em}
+ % \setaftersubsubsecskip{1pt}
+ % \setbeforesubsubsecskip{-1em}
+
% 'abstract' title, bigger skip from title
% \renewcommand{\maketitle}{\{\preauthor \theauthor\} \hfill \thetitle}