Why Might a Note Written for the Right Hand Belong to the Left?

Adult learners often read the treble staff as the right hand and the bass staff as the left. That convention is useful at the beginning, but it is not an inviolable rule. The staves primarily show pitch and the relationship between musical parts. The division of labour between the hands must also serve physical position, continuity and voicing.

Suppose the right hand is carrying a melody high on the keyboard while an inner-part note near middle C appears on the treble staff. Reaching down for it may twist the hand and interrupt the melodic line. If the left hand is already nearby, taking that note can be more natural. The test is not where the note is printed, but whether the rhythm remains steady, the melody stays clear and the transferred note still belongs to the same audible voice. Redistribution is not a licence to change plans whenever a passage feels difficult: a different solution on every run removes stable cues from motor memory.

Circle the transfer note, try both allocations, then close your eyes and judge the phrase by sound. Once you choose, practise two or three beats on either side so the handover becomes part of the musical action rather than an emergency repair. Professional piano teaching treats redistribution as part of fingering design, and dependable fingering is best decided in advance and stabilised together with the hand’s movement.

https://www.pianistmagazine.com/blogs/6-free-lessons-on-piano-fingering/
https://hub.yamaha.com/keyboards/k-how-to/the-basics-of-piano-keyboard-fingering/

When using <a href="https://apps.apple.com/us/app/scoreflow/id6796205656">ScoreFlow</a&gt; to support practice, keep this experiment to a short span around the handover, compare the two allocations, settle on one, and then test it again inside the complete phrase.