[jt327gir]

I purchased my new iPhone4 yesterday, and I love it! But I have one nagging problem with it - I can copy music files to it from iTunes, and I can play those songs and create playlists on the phone itself, but I can't figure out how to delete music files from the phone. The music screen displayed when I click on the "iPhone" devices bar is opaque, so I cannot click anywhere on it, and there seems to be no way to delete files on the phone. I'm probably just an iPhone newbie who needs to be shown where the hidden menu item is and is probably something really simple, but I would be grateful for any pointers on this problem. Thanks in advance!