With RapidComposer you can create the chord track bit by bit with keyboard input then when you have it how you like import into BB. A lot of musicians don't know what chord they are playing so keyboard input is a good idea.
I just try to find workarounds to give the user more options.
I gave a guitarist a Roland guitar pickup to know the chords she's playing.
RapidComposer Exports the Chords as MIDI markers because I ask them to add that same with MusicLab RealGuitar I ask them, I have been asking PG for 10 years.
It just makes it easy to get chords from one app to the other.
To get chord midi markers in midi from BB I have to export as MusicXML import that to Reaper then Reaper will write the midi chord marker from the chords in the MusicXML.
If I export MusicXML chords from Reaper everything reads it but BB.

And RapidComposer running as a VSTi in BB refitting midi riffs with keyswitches from Ample Riffer.
https://www.dropbox.com/s/k7q8ikg7e3pgx0g/Biab-RC-Ample-Bass.mp4?dl=0



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RC-Chord-Input.gif (670.44 KB, 178 downloads)
RC_Midi-Keyboard.png (20.5 KB, 175 downloads)