Pages documents created from certain templates – Classic Newsletter, for instance – include outlined text boxes at the top and/or bottom. These are headers and footers, and can be used for automatic page numbering, chapter headers and so on.
If you tap one you’ll be taken to the Doc Setup screen, where you can change what appears in these boxes, and this will be applied to every page of the document. (You can choose Page Numbers instead of entering a specific number. You’ll be asked to choose a style, “1 of 12″, Page 1” and so on, but the number will be dynamically updated to be correct even if you insert new pages.)
To add headers and footers to your own documents, you need to get back to that Doc Setup screen we were in a moment ago. Open the More menu (tap the ‘three dots’ icon at the top right) and select Document Setup.
As the page instructs, tap at the top or the bottom of the page to insert and edit a header or footer. As previously stated, this will be applied to all pages of the document. Tap Done when you’re finished.
If you want to delete headers or footers, go back to the Document Setup page (either via the More menu, or by tapping a header or footer) and simply delete the offending text.