[Zubersoft]

The header will show up in the title bar if you tap the center of the screen to bring up the song overlay (or you have enabled Settings->Display Settings->Always Show the Title Bar). You can go to Settings->Library Settings->Song Title Formatting and adjust the format string to include key, i.e. %TITLE% - [%KEYS%]. You could also have key only show up if it's not blank, which would be %TITLE%%KEYS: - [${VALUE}]%.

Alternatively, you can put the %KEYS% in the caption field, and enable Settings->Display Settings->Show Caption in the Title Bar. 

Mike