Fabrice Bovy's Album: Wall Photos

Photo 6 of 15 in Wall Photos

I have a question : how can I inverse value of a slider with Pro app ?
I mean, I have a locomotive with 2 motors, I would like to have a slider to control those 2 motors... but the motors are mounted in opposite position. So, when my slider goes from 0 to X, I need value from 0 to X for the first motor and values from 0 to -X for the second motor