Method and apparatus for displaying document image, and information processing device

A document-image acquiring unit acquires document-image data containing a document with an image size larger than a screen size of a display unit and display control data specifying an order of reading the document and a range of the document-image data to be displayed. A display control unit controls a display of specified range by moving a display area on the screen based on specified order. A determining unit determines whether a width of the range in a line direction in acquired document-image data is wider than a width of the screen. The display control unit moves the display area based on a result of determination by the determining unit.