Hi There, I’ve noticed people asking if is possible to Link the Pre-Gain Channel Inputs all in one go. There is no information (surprise) in the documentation, and no option in the Link Group settings. However if you go ahead and link all the selected channels and access the Pre-Gain setting on a single channel it will adjust all the channels together! You’re Welcome 
To be exact, Pre-Gain is included in the Volume option of the Link Group Settings.
The Low and High Pass Filters are included in the EQ option.
Phase doesn’t seem to be included in anything.