The invention relates to a navigation relative function key in key area, wherein when executing the navigation function, only said function key will light in darkness; and the invention can supply portable terminal and relative navigation hot-key display method. And the invention comprises: a key input part for displaying the navigation function key and outputting the key signal selected by user; a navigation lighting part under the function key to light when executing the navigation function; a control part for projecting the key at the input part into the key in navigation mode when the user selects navigation function, to access driving power into said navigation lighting part. The invention has the advantages that: when using navigation function in darkness, the invention can improve the recognize ability on the navigation function key. |