How to inverse / reverse Dimmer?

Hello,

I have 2 devices -
Chauvet ColorSplash 200B and a Generic Moving Head from China that the dimmer works in reverse.
That is, 0% is full ON and 100% is OFF

How do I specify this in the DDF? I also do not see the option in the device properties.

Thanks!

That did not work.

But this did -

<dimmer dmxchannel="5" >
<range type="linear" mindmx="255" maxdmx="0" />
</dimmer>

Thank you!