An electronic device with a display and a touch-sensitive surface displays a page of a first multi-page section of a document and a navigation bar configured to navigate through only pages in the first multi-page section of the document. The device detects a predefined gesture at a location on the touch-sensitive surface that corresponds to a predefined portion of the navigation bar. In response to detecting the predefined gesture, the device displays a navigation user interface that enables selection of a page of the document that is outside of the first multi-page section. The device receives an input in the navigation user interface that indicates selection of a page of a second multi-page section of the document outside of the first multi-page section. In response to receiving the input, the device displays the selected page of the second multi-page section of the document.