# How to make \section items numbers show as Roman Numerals like I II III IV..?

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

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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}

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and how to set space between roman numeral and item name in TOC and in general for sections? –  Kabumbus May 10 '11 at 16:17
Well, you can make \thesection do anything you want, so \renewcommand\thesection{\Roman{section}\quad} would throw a quad space in. However, if you are realy getting into section styling, it is better to use a package like titlesec or a document class like memoir that really gives you fine control over such things. –  Sharpie May 10 '11 at 16:25
quad helps in main article but does not help in \tableofcontents =( –  Kabumbus May 10 '11 at 16:29
@Kabumbus: using the tocloft package you can add to the preamble: \usepackage{tocloft} and \addtolength{\cftsecnumwidth}{1cm} –  Gonzalo Medina May 10 '11 at 16:33
@Sharpie: Never define \thesection with a \quad. Euqation numbers, cross reference whould also use \thesection. –  Leo Liu May 10 '11 at 16:36

It depends on your packages. Maybe you are loading tocstyle or tocloft. Normally you can redefine l@section. See also \@dottedtocline.

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