[Tex/LaTex] How to set the vertical margin of the chapter headings

chapterskoma-scriptsectioningvertical alignment

I currently don't like the typesetting of a document. In my two sided document, I want that the chapter headings not have a vertical space before their appearance.

The text on the second page should start at line 1 or if it's possible on line 2.

My document preamble:

\documentclass[12pt,parskip=half,a4paper,twoside]{scrreprt}
[..]
\usepackage{fancyhdr}
\usepackage{titlesec}
[..]
\titleformat{\chapter}[hang]{\normalfont\huge\bfseries}{\thechapter}{1em}{\Huge}
\titlespacing*{\chapter}{0pt}{0pt}{1em}

\titleformat{\section}{\normalfont\Large\bfseries}{\thesection}{1em}{}
\titlespacing*{\section}{0em}{1em}{0em}

\titleformat{\subsection}{\normalfont\large\bfseries}{\thesubsection}{1em}{}
\titleformat{\subsubsection}{\normalfont\normalsize\bfseries}{\thesubsubsection}{1em}{}
\titleformat{\paragraph}[runin]{\normalfont\normalsize\bfseries}{\theparagraph}{1em}{}
\titleformat{\subparagraph}[runin]{\normalfont\normalsize\bfseries}{\thesubparagraph}{1em}{}

\begin{document}
[..]
\end{document}

Margin

Best Answer

You can try with

\renewcommand{\chapterheadstartvskip}{\vspace*{-2\baselineskip}}

in your document preamble.

When using titlesec as you do, write

\titlespacing*{\chapter}{0pt}{-2\baselineskip}{1em}