Using the Multi Controller.
The multi controller is used to select and set menu and shooting / playback functions.
Pressing the Multi Controller up down left or right indicates which direction your selection is chosen. Based on the menu or function list you are in you may only be able to use up and down or left and right.
Pushing in the center of the Multi Controller allows the use of the <FUNC./SET> button which is used to make selections and set functions in the shooting and playback menus and function menu.