Set margins in Pages on Mac
If you’re working in a word-processing document, you can set the top, bottom, left, and right document margins. In a page layout document, you set margins for headers and footers. Your settings apply to the whole document.
Set document margins for a word-processing document
Click in the toolbar, then click the Document tab at the top of the sidebar.
In the Document Margins section, click the arrows or enter values in the fields next to Top, Bottom, Left, and Right.
For documents that use facing pages, the document margins are Top, Bottom, Inside, and Outside. The inside margin is the side of any page that goes into the binding. The outside margin is the outside edge of each page.
To learn how to set margins for headers and footers, see Add and remove headers and footers.