Map Macro opposite way

[fladd]

Maybe a stupid question, but I cannot figure it out:

How do I map a macro to work the opposite way. Simple example would be a macro that controls both wet and dry, but one of them in the opposite way, such that when I rotate the macro, the wet goes up, while the dry goes down (to keep the overall level the same).

Thanks in advance.

[fladd]

Nevermind, just figured it out, was too easy

For reference: The solution is to make the min value higher than the max value.