I’m not sure whether the i/o levels are per preset, though I would think they likely are not. On my current rig I just max all the outputs and set my presets up so they hit roughly at 0db when I’m at max input from my instrument so volume is fully consistant between presets, and i just adjust input gain / vol at whatever i’m plugged into - interface, poweramp, mixing board etc
I did see a feature for a limiter in the i/o which they didnt get into deep detail on. That might make this easier - but my goal is generally consistent output between my presets with some 2-3db boosts here and there for leads