Custom chapter name in The Legrand Orange Book

Question

I am using the Legrand Orange Book available available_here I want to modify the chapter so that they display as follows

I want the chapter to have numbers starting with the word Unit then the number comes followed by the title. Any hints on this would be greatly appreciated. Thank you.

Answer 1

Add these lines after \documentclass[...]{LegrandOrangeBook}

\usepackage{etoolbox}
\patchcmd{\outputchaptertitle}{#1.}{Unit #1:}{}{}