Hello Betsy, I have never heard of any kind of limit on the number of pages in a book. However, once a book gets too big it’s harder to find a good binding to hold it together, and it’s harder to pick the book up. If you’re thinking of anything longer than maybe 3000 pages, you should talk with a printer about proper binding, good thin paper, etc. to make it usable. And consider dividing it all into separate volumes.
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). document numbering in word