Sure! Here's what I do:
There are 2 notes, "a" and "i". On picture number 1, the note "i" has its default pre-utterance and overlap value, which is 50.
Then on picture number 2, I changed the "i" pre-utterance to 200 and the overlap to 400.
Then on picture number 3, I set the crossfade using P2P3.
And finally, I got a smooth transition from "a" to "i"! The thing is, I don't always want to do this, or if the notes are shorter, I want to use pre-utterance 100 and overlap 200. Or if the notes are very long, I'd use pre-utterance 500 and overlap 1000. That's why I don't want to change the Oto, I want to modify these values per note.