iTunes 11 has been very controversial, and many people are disappointed with its limited viewing options, and are looking for ways to downgrade to iTunes 10.7, the previous version. This is possible, yet it is a bit complex. This thread on StackExchange shows what you need to do to be able to downgrade, though it assumes you have a Time Machine backup or other recent clone of OS X, because it requires restoring certain frameworks in addition to the iTunes application itself.
If you do this, make sure you back up your entire system, and make sure to read the entire thread to see certain problems that may occur.
Mac OS X Hints