| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable information terminal that allows a user to easily understand a change of the entire electronic book accompanying an editing operation performed by the user.SOLUTION: A portable information terminal includes editing means for editing an electronic book, and display means for sequentially displaying a plurality of pages included in the electronic book in order to edit the electronic book with the editing means, and displays, on the display means, points of change extracted by extraction means for extracting points of change of the electronic book edited with the editing means.SELECTED DRAWING: Figure 9 |
