Good point, Jim!
Here's Mac specific details:
control+shift+Q: Decrease the current track’s volume by 5.
control+shift+W: Increase the current track’s volume by 5.
control+shift+E: Decrease the current track’s panning by 5.
control+shift+R: Increase the current track’s panning by 5.
control+shift+T: Decrease the current track’s reverb by 5.
control+shift+Y: Increase the current track’s reverb by 5.
control+option+shift+R: Set the current track’s volume.
control+command+A: Decrease master volume by 5.
control+command+S: Increase master volume by 5.
control+command+V: Set master volume.
control+shift+command+Q: Decrease all tracks’ volumes by 5.
control+shift+command+W: Increase all tracks’ volumes by 5.
control+shift+command+E: Set all tracks’ volumes.
https://www.pgmusic.com/manuals/bbm2023full/chapter15.htm#keystroke-commands-hot-keys