I'm currently writing a book and I've decided to use the fncychap glenn style for my chapter headings. It's working great, but I was wondering if there's a way I could change the chapter name (eg. Chapter 1) in the top left hand corner to "Prologue".
\documentclass[openany]{book}
\usepackage[Glenn]{fncychap}
\begin{document}
\chapter*{Prologue}
\chapter{Redundant Chapter}
\end{document}
So, in the case of what's above, where it says CHAPTER 1, I would like to say 'PROLOGUE', leaving the bottom open for whatever else I want (unconventional, I know. But it's in case I have other stuff I want to put in there later). I have an idea that I'd need to overwrite the \chNameVar but I'm not entirely sure of how to do it. Any help would be greatly appreciated!