I've got a problem with the formatting of the following MWI. I would like to have:
- Page: Abstract with header and title -> done
- Page: completely blank -> not done, header still visible
- Page: Second abstract with header and title -> done
- Page: completely blank -> not done, header still visible
- Page - end: full header, titles, texts -> done
So I think it might be a problem that I have redefined the pagestyle plain, but this was necessary to obtain the header on the first chapter pages...
\documentclass[12pt,a4paper,twoside]{report}
%Layout
\usepackage[top=2.5cm, bottom=3cm, left=2.5cm, right=2.5cm,paper=a4paper]{geometry}
%Header
\usepackage{fancyhdr}
%Chapter adjustments
\usepackage{titlesec}
\titleformat{\chapter}{\normalfont\fontsize{16pt}{0}\bfseries}{\thechapter.}{9pt}{}
\titlespacing*{\chapter}{0pt}{0pt}{16pt}
\usepackage{blindtext}
%Formatting the header
\pagestyle{fancy}
\fancyhf{}
\fancyhead[EL,OR]{\fontsize{8}{5} \selectfont \thepage}
\fancyhead[ER,OL]{\fontsize{8}{5} \selectfont \leftmark}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\fancypagestyle{plain}{
\fancyhf{}
\fancyhead[EL,OR]{\fontsize{8}{5} \selectfont \thepage}
\fancyhead[ER,OL]{\fontsize{8}{5} \selectfont \leftmark}
}
%Abstracttexts
\newcommand{\FirstAbstract}{This is Abstract 1.}
\newcommand{\SecondAbstract}{This is Abstract 2.}
\begin{document}
\pagenumbering{Roman}
%Abstract 1
{\fontsize{16pt}{0} \selectfont {\bf Abstract 1}}
\newline \vspace{-2mm} \\
\FirstAbstract
\markboth{First Abstract}{}
\cleardoublepage
%Abstract 2
\newpage
{\fontsize{16pt}{0} \selectfont {\bf Abstract 2}}
\newline \vspace{-2mm} \\
\SecondAbstract
\markboth{Second Abstract}{}
\cleardoublepage
\newpage
\pagenumbering{arabic}
\chapter{Chapter 1}
\blindtext \blindtext \blindtext \blindtext \blindtext
\chapter{Chapter 2}
\blindtext
\newpage
\section{First Section}
\blindtext
\newpage
\end{document}

clearempty. – Bernard May 11 '19 at 14:33