Hi Toril
this is what I would do ,I would transpose the midi in the song creator to where you want it to begin with, then as always when ever a midi is used you always need to make sure your transpose button on the key board is set to 0 for that song or you would be transposing it again when performing it,then for each part you want to go up + your transpose button
I am no expert on this subject,maybe some else has a better answer for you
as I explained I rarely use midis as I for the most part perform a live show ,I hope this helps,
I make a midi folder and if I should use one I practice always to 0 in the transpose so I am consistent in what I do,
every one has there way of setting up
Paula