Hi Scott,
I understand that the "half page turn" function that I referred to is a mode where when you touch the screen, the screen advances only 1/2 page so that you can always see not only your current place but the next 1/2 page of music. When you touch again it jumps up 1/2 page to show you the then current location plus the top 1/2 page of the next sheet.
This would be instead of touching the screen when on the next to last measure as you described. I think it might allow you more latitude as to when you called for a page turn while performing.
Regards,
Walt