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.
Word's Numbering Explained by John McGhie, MVP - comprehensive and not pretty (Downloadable pdf file in letter size) - Reading this is vital to anyone attempting to use automatic numbering or bullets in a law office setting or other places where the documents are likely to be reused or heavily edited. See also How to Create a Template with a downloadable template with style-based numbering. I strongly recommend that you read both of these before doing anything with the contents of this chapter.
You can't use Word's Numbering feature to generate a multilevel numbering system, even if you use built-in heading styles. Figure A shows a document with two styled heading levels: Heading 1 and Heading 2. You can apply the Numbering option (in the Paragraph group) and Word will number the headings consequently, but the feature ignores different levels; if you expected 1, 1.1, 2, 2.1, and 2.2, you might be surprised. If you select the entire document first, Numbering not only ignores the different levels, but it also numbers the paragraphs!
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!

One of the easiest ways to begin applying numbers is by starting to type a numbered list. Word recognizes that you are creating a list and responds accordingly by converting text that you type into numbered items. The number scheme, delimiter characters that mark the beginning or end of a unit of data and formatting are all based on what you have typed.
In this video we're going to look at starting your page numbering, not from 1, you can see, we started A, B, C, D, and 1 actually starts on page 5. That means we can have a Contents page, and a Cover that don't get included in the page number. That's going to help us with a couple of things, like our Contents page. Otherwise our first bit of text is going to start on page 5. That's not true, it's on 1. It's kind of true. Anyway, let's go and look at setting out our page numbers.
There are three settings we need to embed in this field. The first is to tell it what kind of numbering we want to do (in this case, “First, Second, Third”), what case we want to use (upper case, title case, etc.), and a switch to tell Microsoft Word to increment the numbers. Click each of these settings as shown below, being sure to click Add to Field after each one:
Let's say you just created a paragraph in Heading 1 style. Now, you press Enter to go on to create the next paragraph. What style will that paragraph be in? You can modify a style to stipulate the style Word uses for the following paragraph. So you could set it up so that, when you're entering text, a Heading 1 will be followed by a Heading 2. And, you could set it up so that a paragraph in Heading 2 will be followed by a paragraph in style Body Text.
I have a word document with a table of 6 exact cells on a full page table. In those cell areas I have been printing tickets with a list and a mail merge and updating labels. I call to an excel list of 1-2000 and then I generate all the pages through the Finish and Merge option. This all works perfect. I get 2000 individually numbered tickets to print...however...I then have six tickets printed on a page of paper with ticket numbers 1, 2, 3, 4, 5 ,6 then the next page has 7,8,9,10,11,12. This is fine but I then have to cut and stack these tickets in groups of six and at that point none of the numbering is sequential. The tickets are basically random.
The next step is to create the simple Excel workbook that contains the ticket numbers. Open a blank Excel sheet. Using Figure B as a guide, create the ticket numbering sheet and save it, making sure to note the new workbook's name and location. As we discussed earlier, the Excel workbook stores the ticket numbers. In this example, we'll create 11 tickets numbered 100 through 110. You'll need to update the ticket values for each merge.