Question regarding level scaling for the expansion.

[Pelmaleon]

When does it ask you if you'd like to scale your level? I'm level 6 right now in one of the first expansion areas. If I find a fight too difficult, go and play more of the main game, then come back a much higher level, will the enemies automatically scale? I'm guessing that it only asks you if you'd like them to scale if you are overleveled, meaning I won't get the question unless I am a much higher level. Correct me if I'm wrong.