[GraemeJ]

The search function is really sophisticated I think. You can put bb in the key field and as you type in the song title it will display every Bb song that has those characters in that order and gradually drop songs as more letters are added.

My point was that you don't even need to enter anything into the 'Key' field, a search will find it if the key is entered as part of the name, as originally proposed by saxist.

For example you have a number of titles in this format -  Fly Me To The Moon - Bb, Good Times - Bb, Anything You Like - Ab, etc. - entering just the key part of the song name (bb, ab, etc., t's not case sensitive) will display all the song titles in that key.  The only real limitation is that, say, Much Ado About Nothing - Bb, will still show up, because of the "about", but I don't find this rare occurrence a problem.