\chapter{The Graphical User Interface}\label{ctsim}\index{ctsim}%
\setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
\chapter{The Graphical User Interface}\label{ctsim}\index{ctsim}%
\setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%