Thanks everyone for your feedback. I think I am wrong about it should be possible to save the chords grid in midi files as lyrics. I will try to enter the chord names as lyrics. I am not using a melody part in my songs. Just bass, drums and piano. Is that a problem to create lyrics?
No, not at all.
In version 2018 (Windows) of BIAB...
1. go into Editable Notation Mode
2. right-click on the staff where you'd like to add the chord
3. select 'Insert lyrics' from the menu
Regards,
Noel