Picture display apparatus with selectively divided screens, picture display method for selectively dividing screens, and storage medium

A picture display apparatus, comprising: a synthesizing section for synthesizing divided screens to display a plurality of pictures on a single screen; a menu display section for displaying a menu in which a list of options is displayed, the options enabling a user to select a change to be made to at least one of a number, shapes, relative sizes, and relative positions of the divided screens and types of the pictures, so that the user can select from the options to switch to a corresponding screen arrangement; an icon display section for displaying an icon indicating a border between the divided screens in association with the options; and a border changing section for updating the divided screens according to a change in position of the border, wherein the icon display section displays the icon indicating a result of the change in position of the border before the border changing section updates the divided screens according to the change in position of the border. Thus, the user is informed of what the screen will look like before entering a change of the border.