David,
Does the system have ScreenLogic??
If not you can do it from the little 3" display..
Basically the system comes with preset names.. Such as Aux 1... This is known as the Circuit.. it also has a Circuit
Name.. This is what YOU call it.. it can be anything you want.. As an example if the Aux 1 controls the pool light, it would make sense to name it .. Lights.. But you could name it "Dark".. It does not care what you name it.. Circuit Functions are generally best left set to Generic.. except for things like special lights like the IntelliBrite etc.
You have to go into the menu, setting and the change the Circuit Name of Aux 1 to "Dark"..
Thanks,
Jim R.