In previous versions of iTunes, you could control whether the visual was full-screen or shown within the iTunes window from with the View menu where you turn the visualizer on and off. You could also control the size of the iTunes visualizer from this menu. No longer. I wanted to switch from full-screen to in-window and there is no longer any control in the menu for doing this. Instead, you need to Preferences, and then select the Advanced tab. In this tab you will find the controls for adjusting the size of the iTunes visualizer as well as for controlling whether the iTunes visualizer is shown full-screen or in the window. These controls are a lot less intuitive if you ask me.