I am taking a bass guitar course and am using BIAB to make full chord sheets of a song with the split stems of the real recorded version which has been magnificent for studying and playing. The article I read suggested (I believe) that I could use BIAB to "program the line [bass line] as a melody" in BIAB.

This suggests to me that there is a feature in BB whereby I can write in the actual notes of the bassline at least for my reading so I could play them (not BB playing them) which would bring my BB song with chord chart and split stems into an even more sophisticated practice tool. My fantasy would be to watch the chords progressing on the chord sheet view, hear the split stems playing with the bass muted, and ALSO see on the chord sheet view the bass notes to be properly played.

Clearly I do not know what the article referred to or what a "melody" function is in BB.

Can you help me with this idea? Thanks in advance!