Here is how you do this.
go into the page settings and go to the channels. Then expand your cyberlights and find the CMY channels. Click on the Cyan first. Then you will find a box that tells you the channel number.
Here is a pic:
you see where it shows on my pic 2=? and i have a highlighted section that gives an example of the min and max values. so if you do say 2= 2/255/0 that should reverse the output of the channel. do this for all the CMY channels for all of your fixtures. Let me know how it works.
Sincerely,