Determine what kind of numbering you want to use for your document or book. For long documents, you can assign chapter numbers. Each document can be assigned only one chapter number. If you want to use different numbering within a document, you can define ranges of pages as sections; these sections can be numbered differently. For example, the first ten pages of a document (the front matter) might use Roman numerals, and the rest of the document might use Arabic numerals.
A single InDesign document can contain up to 9,999 pages, but page numbers can be as large as 999,999. (For example, you can correctly number a 100‑page document that starts on page 9,949.) By default, the first page is a recto (right) page numbered 1. Odd-numbered pages always appear on the right; if you use the Section Options command to change the first page number to an even number, the first page becomes a verso (left) page.
For information on creating basic page numbering in a document, see Add basic page numbering.