Hayward OnCommand Group Function

Does anyone know how to set up the "GROUP FUNCTION" on a Hayward OnCommand controller?

I want to set the AUX2 button to turn the SPA mode on/off directly.

The manual says this is done in the CONFIGURATION menu, but there is no menu selection I can find that has anything to do with setting the function up there.  There is a menu item for the AUX2 button, but no GROUP option. It is not listed as a command in the menu structure in the manual either.

Thanks for any magic secrets!

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