
Turn on visual effects in iTunes on PC
Use the iTunes visualizer to watch colorful light shows. You can use the visualizer with or without music; the effects change based on the type of music and whether it’s playing or paused.

If you use the visualizer with a playlist that includes music videos, the visualizer shows the videos by default. You can change this setting at any time.
- In the iTunes app  on your PC, do any of the following to play music or a video: on your PC, do any of the following to play music or a video:- Note: A song needs to be playing before you can use the visualizer. 
- Do one of the following: - Turn on visual effects: Choose View > Visualizer > Show Visualizer. - To change options, choose View > Visualizer > [option]. For example, to show or hide music videos, choose View > Visualizer > Play Videos. A checkmark means that videos will be shown. (Not all visualizers support options, so Options may be dimmed.) - Tip: To show or hide a list of commands you can use to control the visualizer, press the Question Mark key (?) on your keyboard while the visualizer is on. 
- Turn off visual effects: Choose View > Visualizer > Hide Visualizer, or press the Esc key.