[LD Jackson]

You would need to change the song title formatting so that it shows the key in either the title or in the caption. If you go to Settings->Library Settings->Song Title Formatting, you could set the "Title Format" to :

%TITLE% [%KEYS%]

and then every song would show its key inside brackets.

Where would it get the key information? *confused*

I would assume it would retrieve the key information from the song fields that were filled out when I created the songs. There is a specific field for the key.