# Change part environment to chapter environment

This question builds from the post customizing-part-style-with-tikz.

1. How do I go about making this heading work for the Chapters?
2. How to change the PART name that shows up in the number to SOLUTION?

Thanks.

All the hard work is done by Gonzalo already. You have to just change the part to chap and PART to SOLUTION in his code.

\documentclass{book}
\usepackage{fourier}% change to lmodern if fourier is no available
\usepackage{tikz}
\usepackage[explicit]{titlesec}

\definecolor{mybluei}{RGB}{0,173,239}
\definecolor{myblueii}{RGB}{63,200,244}
\definecolor{myblueiii}{RGB}{199,234,253}

\renewcommand\thechapter{\arabic{chapter}}

\newcommand\chapnumfont{% font specification for the number
\fontsize{380}{130}\color{myblueii}\selectfont%
}

\newcommand\chapnamefont{% font specification for the name "PART"
\normalfont\color{white}\scshape\small\bfseries
}

\titleformat{\chapter}
{\normalfont\huge\filleft}
{}
{20pt}
{\begin{tikzpicture}[remember picture,overlay]
\fill[myblueiii]
(current page.north west) rectangle ([yshift=-13cm]current page.north east);
\node[
fill=mybluei,
text width=2\paperwidth,
rounded corners=6cm,
text depth=18cm,
anchor=center,
inner sep=0pt] at (current page.north east) (chaptop)
{\thechapter};%
\node[
anchor=south east,
inner sep=0pt,
outer sep=0pt] (chapnum) at ([xshift=-20pt]chaptop.south)
{\chapnumfont\thechapter};
\node[
anchor=south,
inner sep=0pt] (chapname) at ([yshift=2pt]chapnum.south)
{\chapnamefont SOLUTION};
\node[
anchor=north east,
align=right,
inner xsep=0pt] at ([yshift=-0.5cm]chapname.east|-chapnum.south)
{\parbox{.7\textwidth}{\raggedleft#1}};
\end{tikzpicture}%
}

\titleformat{name=\chapter,numberless}
{\normalfont\huge\filleft}
{}
{0pt}
{\begin{tikzpicture}[remember picture,overlay]
\fill[myblueiii]
(current page.north west) rectangle ([yshift=-13cm]current page.north east);
\node[
fill=mybluei,
text width=2\paperwidth,
rounded corners=6cm,
text depth=18cm,
anchor=center,
inner sep=0pt] at (current page.north east) (chaptop)
{};%
\node[
anchor=south east,minimum width=2in,
inner sep=0pt,
outer sep=0pt] (chapnum) at ([xshift=-20pt]chaptop.south)
{};
\node[
anchor=south,
inner sep=0pt] (chapname) at ([yshift=2pt]chapnum.south)
{};
\node[
anchor=north east,
align=right,
inner xsep=0pt] at ([yshift=-0.5cm]chapname.east|-chapnum.south)
{\parbox{.7\textwidth}{\raggedleft#1}};
\end{tikzpicture}%
}

\titlespacing*{\chapter}{0pt}{0pt}{3.5in}
\titlespacing*{name=\chapter,numberless}{0pt}{0pt}{3.5in}

\begin{document}
\tableofcontents
\chapter{Theory and Application of Continuous-Time Signals and Systems}
Some text comes here.
\end{document}


• I tried your solution, but in the table of contents now, the text overlaps into the blue areas. How to work around this issue? – Joe Aug 20 '15 at 5:55
• @Joe Add \titlespacing*{\chapter}{0pt}{0pt}{3.5in} to your preamble. However, it is better to add a re-definition of numberless chapters in the same way above and adjust the spacing for it too. – user11232 Aug 20 '15 at 6:11