I read thru the manual and couldn't find a definitive answer on this so I'll ask the pros.  Can I control faders that are attached to a none "highlighted" sub group?  Basically I have several instruments connected to my Fireface 800's inputs (1-5) and I also have two separate effects chains setup as send/returns (inputs/outputs 6-8).   Is it possible to control the input faders for each subgroup (effect chain) simultaneously?  I am using this in my Live performance and I don't want to have to reach over for a mouse to "manually" select the subgroup.  Instead I would like to use my midi controller's (Maudio Keystation Pro) faders and knobs to do this. 
Thanks in advance
S