[Zubersoft]

If you tap the center of the screen while viewing a score and the page turns instead of bringing up the overlay, it means performance mode is 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. Then you can access the overlay and annotate your scores.

Mike