itunes won't sync

Help with figuring out iTunes 9.3.2 This new iTunes has music that I have put onto my PC and at one time there was an area where I could check mark the albums that I wanted onto my iPhone and now that section is hidden? I can't find it? and now when I want to add music to my phone from my library it says there are too many selections and won't sync at all because of the music that is already check marked which I can't find ??? HELP