For mono sub inputs 1+2 and 3+4 can be summed.
The preset options can also be changed in multiple channel selections; If channels with different presets are selected, the options of the first preset in the list are displayed and the channels with different presets are ignored when applying the selection. Note that all table columns can be sorted by pressing the column header.Name your channels so that they are easy put in groups ie if you have 4 amps driving the FOH with LR16 then a logic channel name would be "FOH - LR16". This way when you create a group "FOH" you know these channels need to be in there. Channels can also be named in multiple selections.