A printing apparatus comprising: a setting unit arranged to set a multipage printing condition in which a plurality of logical pages (403 to 406) are laid out on a physical page (401, 402) corresponding to a page on which printing is actually performed; and a display unit arranged to display a preview screen showing a layout in which the plurality of logical pages are laid out on the physical page according to the multipage printing condition set by the setting unit, characterized by further comprising: an acceptance unit arranged to accept a drag operation on one of the logical pages in the layout of the preview screen displayed on the display unit; and a changing unit arranged to change the layout of the plurality of logical pages, wherein at least one of which is to be laid out on an existing physical page or a new physical page, when the one of the logical pages is moved by the drag operation, wherein the changing unit is arranged to make a determination, based on a destination area to which the one of the logical pages is moved, as to whether the one of the logical pages is to be laid out on the existing physical page in the layout of the preview screen displayed on the display unit or the one of the logical pages is to be laid out on a new physical page. a setting unit arranged to set a multipage printing condition in which a plurality of logical pages (403 to 406) are laid out on a physical page (401, 402) corresponding to a page on which printing is actually performed; and a display unit arranged to display a preview screen showing a layout in which the plurality of logical pages are laid out on the physical page according to the multipage printing condition set by the setting unit, characterized by further comprising: an acceptance unit arranged to accept a drag operation on one of the logical pages in the layout of the preview screen displayed on the display unit; and a changing unit arranged to change the layout of the plurality of logical pages, wherein at least one of which is to be laid out on an existing physical page or a new physical page, when the one of the logical pages is moved by the drag operation, wherein the changing unit is arranged to make a determination, based on a destination area to which the one of the logical pages is moved, as to whether the one of the logical pages is to be laid out on the existing physical page in the layout of the preview screen displayed on the display unit or the one of the logical pages is to be laid out on a new physical page. an acceptance unit arranged to accept a drag operation on one of the logical pages in the layout of the preview screen displayed on the display unit; and a changing unit arranged to change the layout of the plurality of logical pages, wherein at least one of which is to be laid out on an existing physical page or a new physical page, when the one of the logical pages is moved by the drag operation, wherein the changing unit is arranged to make a determination, based on a destination area to which the one of the logical pages is moved, as to whether the one of the logical pages is to be laid out on the existing physical page in the layout of the preview screen displayed on the display unit or the one of the logical pages is to be laid out on a new physical page.