All, I have a request from a peer to be able to use subset of the cycling layers y0 thru y9 as they are having difficulty seeing some of the darker colors. Can a user specify, give a list of certain cycling layers for probe so only the brighter colors available are always used? geSetProbeUserLPP doesn't seem to take a list and pass to the probe functions. What I mean is: geSetProbeUserLPP(list("y0" "drawing")) now probe will use this color only, but geSetProbeUserLPP(list("y0" "drawing" "y1" "drawing" "y2" "drawing")) as if to say "use these three to toggle thru" does not seem to work. Thank you in advance for any help, Eric