Abstract: When text data and image data are displayed in a scale-down display area in a one-sight display, the text data is scaled down with a first scale-down percentage according to which characters are recognizable, and the image data is scaled down with a second scale-down percentage according to which the image can be all accommodated horizontally and the configuration as a whole can be easily recognized. Moreover, when the text data is displayed in the scale-down display area, a character series included in the text data is adjusted into a character series layout in which a line end is set to correspond to a number of characters per line in the scale-down display area, so that no line in the scale-down display area has an undisplayed character that is not accommodated in that line. The character arrangement of the text data is set according to the character series layout.