In a display device, information related to specified information, which is displayed large in a center portion of a display, by a selected relation criterion is displayed aligned on a selection axis, while information related by other relation criteria is displayed aligned on non-selection axes. Information selected as the specified information can be sequentially changed in accordance with an input from an up or down direction key, and a relation criterion of information displayed on the selection axis and the non-selection axes can be sequentially changed in accordance with an input from a left or right direction key. Also, in accordance with an input from an X button, an immediately preceding input from a direction key is cancelled, and a display condition returns to an immediately preceding history. In accordance with an input from a Δ button, a display condition previously bookmarked by an input from a □ button is displayed.