Dear all, I am writing some text into several panels which I can do with this script (in capital the variables): xyplot(Y ~ X | Z, data = DATAFRAME, groups = Z, ylab= "Y", xlab="X", main="TITLE", scales = list( x = list(draw = FALSE), y = list(draw = FALSE), relation="same", alternating=TRUE), as.table = TRUE, layout = LAYOUT, par.settings = list( strip.background=list(col="white"), axis.text = list(cex = 0.6), par.xlab.text = list(cex = 0.75), par.ylab.text = list(cex = 0.75), par.main.text = list(cex = 0.8), superpose.symbol = list(pch = ".", cex = 1) ), strip = FALSE, type = "l", col = 3, panel = function(x, y,...) { panel.xyplot(x,y,...) panel.text(MIN.X+(0.1*MAX.X), MAX.Y-(0.1*MAX.Y), labels=LABELS[panel.number()], cex=0.3 ) } ) A similar plot also add the autokey because it takes in account two different Y values, but the plot is not drawn rather the function is implemented but the plot remains empty: xyplot(Y1+Y2 ~ X | Z, data = DATAFRAME, ylab= "Y", xlab="X", main="TITLE", scales = list( x = list(draw = FALSE), y = list(draw = FALSE), relation="same", alternating=TRUE), as.table = TRUE, layout = LAYOUT, auto.key= list(space = "centre"), par.settings = list( strip.background=list(col="white"), axis.text = list(cex = 0.6), par.xlab.text = list(cex = 0.75), par.ylab.text = list(cex = 0.75), par.main.text = list(cex = 0.8), superpose.symbol = list(pch = ".", cex = 1) ), strip = FALSE, type = "l", col = c(4,2), key = list( space="top", columns=2, text=list(TEXT_FOR_AUTOKEY, col="black"), lines=list(col=c(4,2)), panel = panel.superpose ), panel = function(x, y,...) { panel.xyplot(x,y,...) panel.text(MIN.X+(0.1*MAX.X), MAX.Y-(0.1*MAX.Y), labels=LAB[panel.number()], cex=0.3, panel = panel.superpose ) } ) I am not attaching actual data because I believe the problem is in the actual call, maybe I am using twice panel.superimpose, although several combination I made (for instance moving the key argument into the panel function) did not solve the problem. Could you tell me where I am getting it wrong? Thank you. best regards Luigi