Similar to this:
lshift+F1 - Lower all notes in current track one half semitone
lshift+F2 - Raise all notes in current track one half semitone
But then the number for the instruments assigned to the note will go 1 up or down. I have checked the manual but didn’t see it… Can it be done?
Nopes, this function does not exists in Renoise.
The only way to do this is to exchange both instruments by swap-loading them from disk.
Also the swap instruments option has been removed.
You guessed it… that was me 
Have a look in advanced edit 
cheers
Yes, but there are no shortcut keys for those options and that was the question.