CK Note: Word 2007 - 2013 interface has an different automatic numbering scheme which I have been told is much less subject to corruption. Microsoft Word 2010 Bible by Herb Tyson, MVP. However numbering is still very imperfect in these later versions. I still recommend following Shauna Kelly's step-by-step instructions (see above) if setting up numbering in a template or in a document likely to be heavily edited. If you start without doing this and end up with "spaghetti numbering," fixing it will be a very large chore!
There are lots of options. For instance, you might reduce the amount of space between the number and the text by changing the Text indent at setting. Or, you might center the heading by choosing Center from the Number alignment dropdown. For even more options, click More to expose several more settings. You could use the Apply changes to option when setting level 1 to the I, II, III numbering style instead of changing it for each level.
Generating an automatic table of contents is explained in Book Design Made Simple on pages 240–244, and the process is just slightly different when you’re using the Book feature. Your table of contents will be included in your front matter document, so open that document and click Layout>Table of Contents to open your Table of Contents dialog box (see our example below). Note that at the bottom left of the dialog box, the box called Include Book Documents is checked. That is the only difference when working in a Book file!

You can insert page numbers on the current page, all pages, all odd pages, or all even pages. When you insert page numbers on multiple pages, a new master layer is automatically created, and the page number is placed on it. The master layer can be an all-page master layer, an odd-page master layer, or an even-page master layer. For more information about master layers, see Creating layers.

Each section within an InDesign document can be numbered differently. This allows you to use one type of numerals to consecutively number a document's preface or other introductory materials and another numeral system for the remainder of the document. You must first define your document's sections, and then you can add section markers or page markers to your master pages. Apply the master page to document pages to include the section and page numbers on the document pages.
The easiest way to implement a numbering scheme for headings is to add one to a heading style. To illustrate, we'll modify Heading 1 by adding a numbering scheme. First, right-click Heading 1 in the Styles gallery (in the Styles group on the Home tab). Then, choose Modify as shown in Figure A to launch the Modify Style dialog. If you thumb through the default properties, you'll not find a numbering scheme (Figure B). Click the Format button and choose Numbering as shown in Figure B. If necessary, click the Numbering tab. Choose the predefined scheme that's the best match for what you want (Figure C).
To modify the options, click the Multilevel List option (in the Paragraph Group). Word selects all lists currently in use in the List Library. You'll see two options below the gallery: Define New Multilevel List and Define New List Style. Use the first to create and save a stable custom list style. You'll use the second to change list styles. You can also use the latter to create a new style. So, what's the difference? The Define New List Style option lets you name a style, so you can share, modify, and delete it later. Most users will never need this option. Now, let's move on: choose Define New Multilevel List. Figure D shows the resulting dialog. document numbering in coreldraw