When dealing with a document containing a large number of pages, the built-in Visio method of selecting which page to view is far from ideal.
Use the 'List/Goto Page' menu to select which page to view. The current page is highlighted.
The list of pages is fully Unicode compatible. Note that if there are a very large number of pages then it can take a few seconds to populate the list.
To save the list of pages in a text file, use the 'Save' button.