There are no UPG:s in the BK-7m and there are no buttons for it. There i only one button called performance list.
That seems to be a list of single registrations. Guess a song can be saved with several single registrations but there is no button to step to next one. So the question is how to do that. Using the dial would not be very good.

Probably best to save each song as its own performance list. Then there would be 999 registrations available for each song.