The Page Layout palette provides a variety of features having to do with pages and navigation.

The Page Layout palette lets you work with master pages and layout pages.

The top portion of the palette lets you create, duplicate, and delete master pages. To view and edit a master page, double-click it; the master page displays in the active project window. A single-sided master page displays as a rectangle, while a facing-page master page displays with two folded corners.

The bottom portion of the palette lets you navigate through the pages in the active layout. To go to a layout page, double-click in this portion of the palette.

To apply a master page to a layout page, drag the master page icon onto the layout page icon. Alternatively, you can select the layout page icons in the palette and them Command-click/Ctrl-click the master page icon.