iTunes 8: How to Hide or Show Genius Bar
Version eight of iTunes contains a genius sidebar that will show music in the iTunes store that is similar to whatever tunes you currently have selected. In many ways, the genius bar is a huge advertisement for the Apple Music Store. Here is how to hide (or show) it.
Although I like the genius playlist creator in iTunes, the genius sidebar is just a huge advertisement. Alternatively, you could see it as a valuable tool to help you find additional music that you might like to purchase. ;)
Here is how to hide (or show) it.

Pressing the icon will either expand or contract the genius sidebar.





