How to set the chapter style in report class?

Question

I want to set chapters to look like 'bigger' sections.

Now in the report class I have a style like:

Chapter 1

Introduction

1.1. Section

What I want to achieve is:

1. Introduction

1.1. Section

I don't want to change the document class.

Answer 1

You could use the titlesec package. For example:

\documentclass{report}
\usepackage{titlesec}
\titleformat{\chapter}
  {\normalfont\LARGE\bfseries}{\thechapter}{1em}{}
\titlespacing*{\chapter}{0pt}{3.5ex plus 1ex minus .2ex}{2.3ex plus .2ex}
\begin{document}
\chapter{Introduction}
\section{Section}
\end{document}

The package documentation will tell you more. Type texdoc titlesec at the command prompt or follow the link to CTAN at the beginning of this answer.

Answer 2

Use the KOMA-Script class

\documentclass[numbers=enddot]{scrreprt}