Apologies for the delay in replying, I've been on vacation.
Using the up/down arrow keys and the enter button when using the crosshair navigation on the channel home view is one way to turn the aux sends on for channels.
Another way to add channels to a mix, or turn them on, is to press and hold down the mix select (to the right of the detail strip) you can use the LCD buttons to turn those channels on and push up the faders to send to that mix. You can also use the VCA and POP groups to bring the channels you need to the surface using this method.
An alternative that I like to use a lot is the 'Collapsed Flip' mode. This can be turned on by going to the preference/user menu and ticking the 'Collapsed Flip' box. When this mode is enabled the 'flip' mode works slightly differently, in that when you select an output the console will only show you the channels that a switched 'on' to that mix. So if you are only sending snare and toms to a reverb for instance and all other channels are turned off, you would only be shown those channels on the control surface. Of course there will always be a times when you need to add channels quickly to a mix. For instance the bass players monitor mix started off with just Kick, Snare, Bass and Vocals. He now wants HiHat and Guitars in his mix. So you can then use the 'hold down mix select' method described above to add channels to that mix. I've found that I actually prefer the 'collapsed flip' method because I can see very quickly what is actually going to a mix and what is not. It's also a very efficient use of channels faders, which again helps to keep relevant information on the surface when I need it.
We are also working a couple of additions options at the moment. One of those will be a global on/off function, similar to the global pre/post function we currently have.
There are explanations of the various EQ modes and Compressor styles available in the various digital console manuals. There are also versions of these available as part of our Facebook User Group Documents here:
https://www.facebook.com/groups/277557352273648/
Hope this helps,