The left navigation sidebar contains a Star Icon. Clicking it expands the favorites / recent pages drawer.

recent pages drawer - expanded

This drawer shows a combination of starred pages within the current project, as well as pages recently viewed within the project.

Clicking on a page will navigate to that page, while hovering over the page shows a star icon on the right, allow you to star the page as a favorite, or unstar it.

To dismiss the drawer, simply click away from it, or hit the 'Esc' key on your keyboard.