I'm just trying to make my first steps at creating a style by myself, and I'm wondering how I can tell BIAB which piano notes belong to the left hand and which ones belong to the right hand (in detail, not just by defining one fix split point).

Since for the prefab styles the BiaB piano window shows notes of both hands in different colours and since sometimes the left hand notes jump far into the keyboard area where elsewise the same style shows right hand notes, it must be possible to determine specific right hand notes and specific left hand notes in style patterns - but I couldn't find out how, so far. I'd appreciate some help.
BiaB Pro 2022; Windows 10
Bass: Intermediate; Piano: Beginner
I came to this forum in order to suggest feature improvements for non-professional musicians like myself that use BiaB mainly as a playalong tool and as a learning tool