I am writing my dissertation and I am requested to write the chapter titles as inverted pyramids. Because of the specific margins I have on the format I am using and because of the specific words I have in one title, I am not able to make it. How can I force the margins of one chapter title only to be a little wider?

This is my title:

\chapter{Effects of Irradiance and Ambient Temperature on a Decision-Making\\Tool for Rooftop PV Array Sizing\\ for Commercial Buildings}
  • Welcome to TeX.SX! What class are you using? The standard book class typesets chapter titles ragged right, which is difficult to make inverted pyramids with. – egreg Sep 7 '18 at 21:23
  • I am using a customized class from my university. The title is actually centered. – Carlo Bianchi Sep 7 '18 at 23:23
  • Without some detail about the class, it's impossible to help – egreg Sep 8 '18 at 5:43
  • 1
    If your university wants pyramidal chapter titles and they supply the class, then they should modify the class so that the results suit their demands. – Peter Wilson Sep 8 '18 at 17:25

Set the title inside a centred box using \makebox[\linewidth] and stack it using tabular:

enter image description here


\usepackage{geometry} % Just for this example
  paper = a3paper,


\chapter[ToC title]
  {\makebox[\linewidth]{\begin{tabular}{ c }
    Effects of Irradiance and Ambient Temperature on a Decision-Making \\
              Tool for Rooftop PV Array Sizing                         \\
                 for Commercial Buildings


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