# Roman numbering in chapters heading

Could someone help me with this problem with my document?

% % % %

Chapter 1

Title

% % % %


I would like the following text:

% % % %

CAPÍTULO I: TITLE

% % % %


Please note the capital letters. I'm wondering because my institution have specific guidelines for writing thesis and I'm struggling with that.

Trying by myself I got this

I Título

2.1 Sección

2.1.1 Subsección


By using this code

\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\arabic{chapter}.\arabic{section}}


Which is pretty close to what I need, then I only need, then I only need to add the word "CAPÍTULO" on each heading just before it's number in roman and in capital letter to see like this:

CAPÍTULO I: TÍTULO


I'm done, I simply wrote the chapter's name on capital letter on the main text and added this code

\def\chapter{\cleardoublepage\secdef\@chapter\@schapter}


and tha'ts it, I hope that won't affect too much the rest of the text.

• Welcome to TeX.SX! You could take a look to titlesec package and it's documentation if you want to learn about such changes. But sure someone could give you a ready to use answer. (If you could add a MWE it would be a better question : tex.meta.stackexchange.com/questions/228/…) – koleygr Feb 28 at 16:37

\usepackage{titlesec}