14. A method of using a document managing apparatus, the method comprising: storing an order of a plurality of documents constituting management objects; generating image data including representative image data in a specified data format for each document; storing the image data generated; detecting a fluctuation amount input into an input device; determining the order of the document to be displayed in a display which displays the image data stored based on the fluctuation amount detected, if detection of the fluctuation amount input is during a state in which image data of a document is displayed in the display; and switching the image data of the document displayed in the display to the representative image data of the document having the order determined.
14. A method of using a document managing apparatus, the method comprising: storing an order of a plurality of documents constituting management objects; generating image data including representative image data in a specified data format for each document; storing the image data generated; detecting a fluctuation amount input into an input device; determining the order of the document to be displayed in a display which displays the image data stored based on the fluctuation amount detected, if detection of the fluctuation amount input is during a state in which image data of a document is displayed in the display; and switching the image data of the document displayed in the display to the representative image data of the document having the order determined. 16. The method according to claim 14 , wherein the fluctuation amount detected is converted into a document moving amount indicating the number of documents to be moved, and an order is judged that is obtained by adding the document moving amount to the order of the document whose image data is displayed in the display, if the detection of the fluctuation amount input is during a state in which the image data of a document is displayed in the display.