Manual Crossfade/ Set time for Cues

The other day I was sitting at a GrandMA and what I really liked was that there is a extra fader with which you can set the fadetimes for recorded cuelist. Or you could use it to manually crossfade cues.

I remember that there was a crossfader at HogII, but I think that you had to hold the choose button to use it.

It there a way to use one fader as a general crossfader?
For example: You pick a list from the cuelist directory without assigning it to a fader and set the time with another fader?
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