DPlot

I have a plot with 2 Y axes and 1 common X axis. I want to inverse Y and keep Y1 uninverted or the other way around. As far as I can see the only option is to inverse them (Y and Y1) both at the same time. Is there any way that I can get this done?

Select Options>Extents/Intervals/Size, check "Specify extents", and swap the the low and high values for the axis you want to flip.