How to Edit Song Information (and More) in iTunes
iTunes allows you to edit, or change, the information they’ve supplied from the iTunes Store for the movies, TV shows, music videos, audio books, and podcasts you download. And if you obtain your content from other sources, you might need to add information for the first time.
In List view, you can edit the content information by clicking directly in the specific track’s field (such as the Artist field) and then clicking again so that the mouse pointer toggles to an editing cursor. You can then select the text and type over it — or use the Copy, Cut, and Paste commands on the Edit menu — to move tiny bits of text around within the field. As you can see in the figure, the Artist field is changed to Beck, Jeff.
You can edit the Name, Artist, Album, Genre, and My Ratings fields in the list. However, editing this information is easier by choosing File→Get Info.