I can't see any option in BIAB for just transposing a certain bar or range of bars.

This would be so useful in experimenting with new song ideas.

This would also be useful in the Chord editor. Being able to put in a chord - say a slash chord but then simply clicking a UP or DOWN button to shift the chord up or down by a semitone while hearing the sound of the transposed chord would be great for
experimenting - particularly in modern jazz or fusion.

Note that the first part of this wish, transposing a certain bar or range of bars, is for the Mac version only.

BIAB for Windows has had Edit, Transpose From .. To for awhile.

BIAB 2018 for Mac does not have this option, and it would be good if it were added.

+1