Mark display unit for vehicle navigation

A mark display unit for vehicle navigation, the mark display unit displaying marks on a display screen, each of the marks associated with a geographical position, comprising:

• a dial selector with a push function, a push operation of the dial selector being associated with selecting one of a plurality of categories corresponding to the number of push operations, and a rotational operation of the dial selector being associated with selecting one of a plurality of items regarding a selected category corresponding to the rotational position of the dial selector, the plurality of categories and the plurality of items assigned to the marks;
• and
• a controller configured to display on the display screen one or more of the marks according to a combination of the number of push operations and the rotational position of the dial selector,
• wherein the selected item is switched among the plurality of items in association with the rotational operation of the dial selector, and as the selected item is switched, the controller displays one or more of the marks assigned with the item selected by the dial selector, by switching a display mode of each of the marks between a displayed mode and a not-displayed mode, each of the one or more of the marks displayed at a corresponding position on the display screen.