Going with magic, here. Let's say I wanted to Pyrofuego and set the whole place on fire. I have Conviction of 4 with no particular foci (for simplicity's sake), so if I blast an individual with this, I have to roll a 4 to control it (with Discipline helping out), they dodge against my 4 and if they're hit, they take the extra stress they missed their roll by and 4 stress, besides. Easy enough.
Now as a Zone attack, the rules say to take 2 off the power. But I still have to roll a 4 to control this, correct? And everyone in the zone dodges against my 4-roll, right? If they're hit, they take an additional 2 stress, not 4, because I lost 2 to making it a Zone, correct? Or do they dodge against a 2, because I lose 2 on my control, too?
This is where Maneuvers come in. If I wanted to make a zone attack as a maneuver (let's say, instead of fire, it was wind to just knock everyone on their ass), the -2 would be off of power, but since we're not dealing damage, does that become irrelevant? Just a 4-shift dodge (or whatever my Discipline rolls to) and they're left standing or not?
Am I interpreting this right?
EDIT: looking at p325 of YS, it seems I am correctly interpreting this, but I'd like some confirmation, still.