# How do I remove chapter number at the start of each chapter without affecting the subchapters?

How can I Remove the "Chapter 9" text and number in front on the chapters. see "chapter 9" below in the picture. I want to keep the numbering for the sections and subsections in the text and in the table of content.

I have seen methods to remove chapter number, however the section count will then continue from the past chapter. For instance 9.1 Chapter overview will be changed to "8.12 Chapter overview"

\documentclass[12pt,twoside]{report}
%\documentclass[draft]{article}
\usepackage{graphicx}
\graphicspath{{images/}}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{textcomp}
\usepackage{gensymb}
\usepackage[utf8]{inputenc}
\usepackage{nomencl}
\makenomenclature

\begin{document}

\chapter{Results section overview \& Reservoir Characteristic}
\input{chapters/Reservoir_Characteristic.tex}

• @Cragfelt: I am not entirely convinced that this is a duplicate. Reading the question title it almost feels like this post is asking for something like the opposite of that question. – Willie Wong Dec 2 '19 at 16:28
• It would help greatly if an image (or a description) of the desired outcome is included in the question. The title of the question is slightly ambiguous in its phrasing and it is not 100% clear to me what is being asked. – Willie Wong Dec 2 '19 at 16:29
• What is your question? It ends ".. so the table o" – Peter Wilson Dec 2 '19 at 17:56
• Thanks for the feedback Willie and Peter- I have updated the question and picked out the codes i think are the most relevant. – Marius Dec 4 '19 at 8:57
• So, what you want is to change the chapter head so that only chapter title is printed, not the sentence Chapter 9. – Sigur Dec 4 '19 at 12:41

This kind of formatting can be done with the titlesec package. Using this package, the standard formatting for a chapter title is defined with the command

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


The argument {\chaptertitlename\ \thechapter} is the one which asks to write the huge "Chapter 9" text that you want to be removed, so you can just leave that argument blank and nothing will appear. For more details, see the package documentation.

The following code should work.

\documentclass[12pt,twoside]{report}
\usepackage{titlesec}
\titleformat{\chapter}[display]
{\normalfont\huge\bfseries}{}{20pt}{\Huge}

\begin{document}

\setcounter{chapter}{8}
\chapter{Results section overview \& Reservoir Characteristic}
\section{Chapter overview}

This chapter present...

\section{Results Static and Dynamic Model Characteristic}
\subsection{Permeability and Porosity L14 \& L25}

\end{document}