upside down fader...

hi...

First of all sorry about my awful writing and English...

I have a driver problem with my moving heads and the road hog console...

So on Today when i make a scene with the colour changing speed and after that i copy the scene to a fader to control it quickly in the show but there is a mistake because of the driver in my scene like this when the colour changing speed is full there is nothing happens and when i change the speed to the %50 or %20 it start to change like a crazy wind and also when i set the fader to %0 the colour is white ...

If i hade a chance to change the faders control upside down everything about the program is fine before i write a new driver to my moving heads...

Is there a way to make the faders level upside down like this when the fader is at the top, the level is %0 and then the fader is at the botton the level is %100....
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