Now, I know that I can change the sounds for each of my tracks by using the keyboard
itself, but that gets kinda tedious - especially if I'm changing them often to see what
works best. What I'd like to be able to do is to use Logic to change the keyboard's
sounds... but how?!
choose the midi track in the arrange page, and then look at the parameters at left (if not visible, go to view > show parameters). then there is place to change the bank/patch. click the check box to make it active. then it will be there when you open that file. you can also change the patch from there.