Turning on visual effects
Use the iTunes visualizer to watch colorful light shows. You can use the visualizer with or without music; the effects change based on the music playing.
To turn on visual effects:
Choose ViewÂ > Show Visualizer.
To change options, choose ViewÂ > VisualizerÂ > [Option].
Your selection might not work with all effects.
To show or hide a list of commands you can use to control the visualizer, press the ? key.