Hello, I have made a plot using xYplot, but am having trouble with some final touching up details. I would appreciate your help... The below code results in a plot of 4 species, with the species being the same color. So, the first three points are blue, the second three are purple, etc... The first thing I would like to do is make the points alternate colors (to represent species in sites), so that the points in each panel are blue, red, green, blue, red green. Also, how can I add a label on the x-axis for each species, so that in the first panel "A" and "B" are below the first and second groups of three points. y=rnorm(12, 15, 0.5) sy=rnorm(12,0.2,.01) x=rep(c(1:6), 2) spp=rep(c(1,2,3,4),each=3) gld=rep(c(1,2),each=6) xYplot(Cbind(y, y-sy, y+sy)~x|gld, groups=spp) Thanks, John