Songbook plus by far. It lets you zoom each song just right and remembers it and with midi it can control your keyboard from pad to keyboard or keyboard to pad.
best $20 I ever spent
MEL
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KORG PA1000, KORG PA900, 2 BOSE S1 PROS, 2 BOSE L1 COMPACTS, YAMAHA STAGEPAS 500, ROLAND VP7