Playlist View Options function disappeared in iTunes

Yes, this option to control what columns show at the top of the window seems to have disappeared. Previously it was accessed with the keyboard shortcut COMMAND + J. Doing a Get Info on a song shows that all of the information's there, but there doesn't seem to be a way to control what data fields display as column headers. Changing the pulldown menu in the upper right corner from Playlists to Songs brings back the columns as they used to look, but no options seem to exist for changing that view. Also, I seem to recall a thumbnail showing on the left hand side in the Songs view, but I could be mistaken. The Playlist view shows it, but it's too big, and I can't seem to find a way to shrink it down. Additionally, the Playlist view has column headers I don't want, but they don't seem to be changable.