Since all charts are key-labile, any chart can be instantly transposed to any key, and the key isn't fixed, i'm not sure what a key signature sort would accomplish.
You could already set this up for personal use by including your preferred key for a chart IN THE TITLE.
Then a keyword search of your song index would instantly list all songs labeled ”Eb" no matter what key the chart might have been transposed to.
It would be helpful if there were a searchable "tag" field on each chart other than just the title.
A way for users to attach multiple user-tags or keywords to individual songs in the index would be very useful.
The tags for a song might be entered (and displayed) ONLY in the song editor, perhaps as a second (hidden) line in the title field. The tag/keyword line would not display on the chart in song view, but still might be searchable using the current song index (title) search field.
Without needing to maintain many separate playlists, a user could instantly, using the index search, bring-up all charts they've tagged as Sinatra, Cole, Como, Beatles, wedding, holiday, 1940's, a vocalist(s) or band(s) they perform with, or any other keyword(s) they chose to attach...*
Currently, users append personal notes in the title which is quite cumbersome.
)BOB
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