[Zubersoft]

It sounds like performance mode has been enabled. To disable performance mode, tap the lock icon in the floating toolbar at the bottom right corner of the library screen. This same toggle can be accessed by tapping the bottom right corner of the screen while a song is loaded to display the quick action box. Once performance mode is disabled, you should be able to access the song overlay and the annotations functionality again. Let me know if you have any questions.

Mike