Hi Chris!

Thank you so much for the fast reply! I am attaching a snapshot of the two overlays' color bars. As you can see, both the positive and negative overlays share the same light to dark scale: the color goes darker as the value goes smaller. I want to reverse the light to dark scale for the negative overlay, make "zero" darkest in both overlays.

I apologize ahead if I did a bad job explaining the plan! Again, thank you so much for the help.

Best,
Momo