The navigation status bar and the items in the View > Pages menu are available only if the Multipage document checkbox is set in the Multipage Settings dialog.
The status bar contains information about the current page number in a text field and the number of all pages on a label.
It also contains a collection of buttons to aid quick navigation in the document.
All the navigation possibilities: go to first, previous, next, last, specific pages are available from the View > Pages menu as well.
Also, some automatic page zooming functions are available in this menu, these are as follows: