A wagering interface is disclosed for a gaming apparatus, for applying a wager when playing a game. The wagering interface comprises a display screen for displaying at least a portion of the game being played and a slider which is repositionable along a slider path orientated to extend from a lower portion of the display to an upper portion of the display. The wager applied when playing the game is dependent on the position of the slider along the path which thus provides a gamer with a visual indication of the wager applied, and thus enables the gamer to better coordinate the application of the wager.