ok... two different requirements here...
overall preset level:
how you manage this depends upon your grid layout
if you only have a single block going to your output then you can alter the level of that block or in the output mixer [layout -> end] for that particular grid row
if however you have multiple blocks in parallel you can either change the output levels of them both [which is a pain in the rear] or change the level of the last block that is in series before the signal splits [which is more sensible because you maintain the relative levels in the two parallel signal paths]
real-time control:
if you want a boost you can apply live [so that you can sit 'in the mix' and then occasionally 'step up'] then there are a couple of options..
and note, you do not need to add a new fx block for this..
[the only time you need to at a block for boosting is when you want to boost / shape the signal entering the amp - typically because you want more gain and / or more mids. with this application, using the boost does not really give you more level, it gives you more dirt / gain]
switch to boost -
determine which block you will use to provide the increase in level [generally the one that is last on the portion of the fx chain that is in series].
determine which switch you want to use to toggle between the boosted / unboosted values [this will be either an instant access switch <AI> or an external switch <XS> - you need to decide before we go through the config]
you then assign the output of this block to an external modifier used by that IA / XS and set the min and max values to taste
when you hit your switch, your level will switch immediately to the higher value..
hit the switch again and you drop back to the lower value
pedal to boost -
as before, determine which block you will use to provide the increase in level [generally the one that is last on the portion of the fx chain that is in series].
determine which expression pedal [XP] you want to use to toggle between the boosted / unboosted values [this will be either an AI or an XS - you need to decide before we go through the config]
you then assign the output of this block to the external modifier used for the XP and set the min and max values to taste
when you wiggle your pedal to the toe down [possition, your level will gradually move to the higher value..
move the XP to the heel down possition and you drop back to the lower value
it all sounds a bit fussy, but none of this is difficult to set up - there's plenty in here that can walk you through the steps
Q - do you have an MFC or something else?
Q - do you want to boost via a switch or a pedal?
Q - do you have a switch or pedal that can be assigned to this control?
"I`d like to have a volumboost nob on my GCP as well. "
GCP - is that a Ground Control floor controller? does this mean you have additional expression pedal/s and would like to assign it to boost the level?
