Default setting for grand master and DBO key.

I would like to have setting for grand master and DBO key for Disable to use one of them or both.

And,

I would like to have group master that does not effected by grand master.
I.E
Emergency LX or Exit LX.

So, I would like to have following method.
Move group to fader like as group fader.
Somewhere of inside play back option.
I would like to choose option for effect by grand master or DBO key.

Thanks,
Aki