[Tex/LaTex] How to make \section items numbers show as Roman Numerals like I II III IV..

numberingsectioningtable of contents

And how to make them show as roman numerals in TOC?

Best Answer

Change the representation of the corresponding counter (section, in this case) by adding to the preamble:

\renewcommand\thesection{\Roman{section}}

EDIT: this redefinition will probably require increasing the space allowed for typesetting section numbers in the ToC; this can be done, for example, with the help of the tocloft package by adding the following lines to the preamble:

\usepackage{tocloft} 
\setlength{\cftsecnumwidth}{1.5cm}