Page numbers in Google Docs - how it works
- You go in the menu bar, click "Insert".
- In the context menu, select "page number".
- Finally, you can specify whether you want to have the page number "at the Top of the page or at the Bottom of the page".
- On the menu bar at the top, you can now specify whether the page number to the left, right or center should appear.

Word Processing Google Docs
You need for your extensive Google Docs documents, a table of contents, you should here read more.
