How to make a white out cue

I am programming a show and have a number of looks on various faders and want to have one fader where when I hit the bump button all my moving heads can go to open white or something and then when I release the bump button everything is as it was. I can make the look I just cannot seem to determine what setting I need on the cue stack to have that work.

Any help?

Using a roadhog full boar it that helps.
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