1. In a computer system having a graphical user interface including a display device and an input device, the input device having a positioning means for controlling movement of a display-element on the display device and a signal generating means for providing an input signal, a method of manipulating the position of vertically and horizontally oriented page-breaks in an electronic document having multiple pages and displayed on the display device, the method comprising the steps of: in response to actuating the positioning means of the input device, positioning the display-element over a page-break, the page-break being located at an initial location in the electronic document; in response to actuating the signal generating means of the input device while the display-element is over the page-break, displaying a phantom page-break positioned over the page-break, and activating a drag mode; in response to actuating the positioning means of the input device while the phantom page-break is displayed and the drag mode is active, positioning the phantom page-break at a new location in the electronic document; and in response to actuating the signal generating means of the input device while the drag mode is activated and the phantom page-break is positioned over a new location: deactivating the drag mode, moving the page-break to the new location, and removing the phantom page-break.