If you'll click on the green "Real Track" at the top of the screen (or in the mixer), it will bring up A menu of options. About a third of the way down that menu is "select MIDI track", which will let you select a midi instrument and a midi style to use. I think that's what you're after.

Bruce


Macbook Pro 2018
2.6 GHz 6-core Intel Core i7, 16 GB RAM
OS Monterey
BIAB for Mac 2022