Select Ch1 and then go to the routing screen, that will show you
all the assignments and levels.
Also….you can check the channel assignment by holding down the green
assign button on the left hand side of mixer surface, while holding that
down select each mix via the blue mix button, as you select the mixes
the select buttons for the channels that are assigned to the selected
mix will light up.
Hitting the channel select button while holding the assign button will select
or de-select the channel from the mix you have selected.