# Making double spaced Chapter title in latex using titlesec

I am beginning to write my first draft of my dissertation, and my institution requires that my chapter titles be centered and have the following format.

--larger vertical space--

'Chapter' Chapter number

--vertical space--

Chapter title

--larger vertical space--

I'm trying to use the titlesec package to do this, but I'm having some trouble understanding why this is not working.

In my preamble this is what I have for the chapter title format

\usepackage{titlesec}
\titleformat{\chapter}[block]{\filcenter\normalfont\LARGE\bfseries}{Chapter \thechapter}{1em}{\LARGE}
\titlespacing*{\chapter}{0pt}{10pt}{0pt}


and later in the document I have this,

\chapter{Introduction}


but this is the output.

How can accomplish this desired format? And if possible, is there a link that can be provided for how using the titlesec package on this site? I'm referring to a pdf I have that is supposed to detail how to use the package, but it provides very few examples and I'm also quite new to LaTex.

Thank you

• Use the display style in the first place. If you do not want the word ‘Chapter’, don't write it in the code. And you might be interested in the Advanced interface section of the documentation. Aug 11 '20 at 17:40
• I do want 'Chapter', not sure why you think I don't want it. Aug 11 '20 at 17:42
• Oh! Just because you didn't mention it in the specifications, and it is also a possible layout, especially with very big chapter numbers. B.t.w. for vetical spaces, it might be interesting to use ex as a unit (it is the height of the x letter in the current font). Aug 11 '20 at 17:45
• Oh ok. I can see how that can be confusing. But yeah basically I'm just looking to have a double space 'Chapter' chapter Number then chapter Title Aug 11 '20 at 17:50

Here is a starting point. In \titlespacing, I used the shorter notation *12, &c., which means a verical spacing of 12ex, with some stretchability/schrinkability if necessary. Adjust the values to your needs:

\documentclass[11pt]{book}
\usepackage{XCharter}
\usepackage[showframe]{geometry}
\usepackage{lipsum}
\usepackage{titlesec}
\titleformat{\chapter}[display]{\filcenter\normalfont\huge\bfseries}{Chapter \thechapter}{1em}{\Huge}
\titlespacing*{\chapter}{0pt}{*12}{*20}

\begin{document}

\chapter{Introduction}

\lipsum

\end{document}