All Categories / Organizing Your Music, Working with Scores
When you’re working with metadata, a box to the left of each field helps you understand and control what will happen to any existing information once you’re done editing. If it’s unchecked or empty, no changes will be made to your file for that specific type of metadata. If it’s checked, the file’s existing metadata will be replaced with whatever you’ve entered in. The best choice is selected for you automatically as you work with these fields, but you can tap the box at any time to change it. For instance, if you want to clear out any existing values for a field, delete the text and then tap the box on the left so it shows a check mark. This replaces the value that was there previously with the one you’ve entered in: nothing.
If you’re batch editing, the Composers, Genres, and Tags fields will toggle between the same “checked” state—meaning that existing values will be replaced with whatever you’ve typed in—and an “append” state (a plus symbol). In this case, the + indicates that the values you’ve entered in will be added to the selected files, and that all existing values will be preserved.