2 questions here:
is there a way to be able to still use the head's main volume when i plug my pod xtl into the effects loop?

is there a difference in which output i use on the pod when plugging into the effects loop?

i am playing guitar for my college marching band this year and i am going to need to get as much volume as possible that way i'm not getting drowned out by the 350 people behind me!