1. In a system for storing documents having text and voice components and including display means, document display means for displaying a representation of a portion of one of the documents on the display means comprising: text display means for displaying a representation of a text component belonging to the portion; voice component position indicating means for indicating the position of a voice component belonging to the portion relative to the text component by indicating a position relative to the text display means; and voice component length display means for displaying the length in time of the voice component.