The blue, dotted line indicates an implicit page break where the content has flowed to a new page. Use the same approach for adding/editing explicit page breaks in the Page view as you would in the Web view, by adding/moving/deleting a "New Page" element.
Note that we maintain separate page breaks for each view. A "New Page" item added in the Web view is not included in the layout of the Page view, and vice versa.
Seems as if the answer was just to cut down the length of some fields.