Beginner question - reversing wheel spin?

i'm just starting to program my show and have what I hope is a very basic question.

How do you reverse the direction of a rotating color wheel or gobo?

Basically on my VL1000's and Trackspots, the gobo button shows both directions on the label but the spin is only clockwise. On the Tracks its the same for the color wheel and gobos.
I'm sure it's something very basic, but I haven't been able to find it yet.
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