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Thank you!

It works fine and it is pretty much closer to my initial idea! But I would like to insert in the unnumbered chapters a blank line of the same height as the line in which appears the text "Chapter 1" or "Appendix A" in the numbered ones.
Is it possible?

Thank you!

Dear Thorsten,

I am using the report class. I am using this common code with the numbered chapters, similar to the ger style in the memoir class, with nice results:

\newcommand{\bigrule}{\titlerule[0.5mm]}
\titleformat{\chapter}[display] % cambiamos el formato de los capítulos
{\bfseries\Huge ...

Hello everyone,

I am writing my PhD thesis and I am dealing with some problems with the bibliography title style. I have redefined the heading title of ToC, LoF and LoT as:
\makeatletter
\def\tableofcontents{%
\newpage
\thispagestyle{plain}
\vspace*{24.5pt}
\rule{\textwidth}{0.4pt}
\begin ...