A Music-minus-one score is a PlayScore 2 Playable Score with one part (usually the solo part) muted. Music-minus-one lets you practice your solo part to an accompaniment.
Instruments – you can enhance your score to use instruments (see Instruments and orchestration)
If your score has transposing instruments you can use the Auto-transpose feature (see Transposing instruments)
Count-in (Apple devices only) – If you need a little time to pick up your instrument, tap the icon 2nd from the left at the bottom and select a number of Count-in measures