How can I reduce the space below the chapter name when using the document class svomono in this version file In the MWE the space between "My chapter" and "Text" is too big. Best would be a solution without manipulating svmono1.cls.

\documentclass[envcountchap]{svmono}

\begin{document}

\chapter{My Chapter}

Text ...
\end{document}


With \usepackage{titlesec} and \titlespacing (see below) the problem is that it writes "chapter 1" what I do not want. When I do not use [display], it' completely gone. At the beginning of a chapter just the chapter number should be there and a horizontal line below (as in svmono normally).

\documentclass{svmono}

\usepackage{titlesec}

\titleformat{\chapter}[display]
{\normalfont\huge\bfseries}{\chaptertitlename\ \thechapter}{20pt}{\Huge}

% altering spacing after chapter name (third length argument) to 0
\titlespacing*{\chapter}{0pt}{50pt}{0pt}

\begin{document}

\chapter{One}

Text

\end{document}

• The svmono class is for submissions to Springer. Do as they want. Dec 12 '20 at 16:52

Add the following lines after the \documentclass command.
\documentclass[envcountchap]{svmono}

• My solution modifies svmono.cls as little or as much as any attempt to tweak the chapter heading with titlesec. Apparently svmono is not compatible with titlesec (otherwise your attempt would work), so you can either use a standard class (svmono is not standard, but idiosyncratic to Springer), or be happy with what svmono.cls does (after all, why do you use this class if you don't like its look?), or patch it as I suggested. Dec 12 '20 at 16:18