It is one object of the present invention to improve the text editing operation provided by document creation application software. A text editing apparatus that is implemented by a computer under the control of document creation application software comprises: a document data controller for controlling a process for editing target document data read from a memory; and a document display controller for displaying a document, on a predetermined display device, based on the document data read by the document data controller, wherein, for each section constituting the document data, the document display controller provides a display area, and in accordance with the size of the display area, displays part of the document in the section.