By Key

Using the Keys tab, you can see what keys songs in your library are in. If you have songs that do not have a key, they can be retrieved using the None option.

This screen lists displays each key in rows with the quantity of songs in each key shown on the right. Tap on the row to view songs in that key.

While the list of keys is sorted in alphabetic order by default, you can tap on the sort button in the lower right corner to sort the list by quantity of songs. This will place keys with the most songs at the top of the list.

The + button on the lower right allows you to Add Songs.

Songs are not added to the particular key. The + button is added for continuity in the user interface.