Is there any way to add documentation to a new / modified style?

I can see how to get information into the small "memo" box on the right hand side, and also into the lower boxes, but the large "memo" box seems to be inaccessible.
PGMusic uses it to document instruments and such, and I would like to do the same.

I checked BBW.LST and the instrument information is not included, even for styles that have the information.

Thanks


BIAB for Windows Version 2019 (643)
Windows 10 (1909)