Suppose you’ve made some changes to the styles or swatches in your chapter 5 document, and now you want to use those updated styles or swatches throughout your book. Click in the column to the left of chapter 5 to set chapter 5 as your book’s style source. Select all the other documents that you want to synchronize to chapter 5 by pressing Ctrl/Cmd and clicking the documents (they’ll turn blue when selected).

You can define a section prefix to label section pages automatically. For example, if you specify A– for Section Prefix on page 16 of a document and include the section prefix, the page will appear in the table of contents or index as A–16. Text you type for a section marker appears when you choose Type > Insert Special Character > Markers > Section Marker.
When the “Current Page Number” placeholder sits on a master page, every page to which you assigned that specific master page will display this variable – the number will change automatically on every page. If you change the style assigned to the placeholder on the master page (let’s say you set it to bold), all page numbers will update to that style (all numbers will become bold).
While InDesign veterans may assume everyone already knows this, I can assure you I have worked with very sophisticated documents from designers who did not take advantage of this basic feature. A good rule of thumb to keep in mind as you tackle InDesign challenges is this: If it’s repetitious, tedious, or time-consuming, there’s probably a built-in solution right there in the program. You just need to go look for it.
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