I'm sorry to ask such a stupid question, but I didn't find how to plot each page with the function xyplot on a separate graphic device in order to have all the pages opened after calling the function. When doing:> data(quakes) > Depth <- equal.count(quakes$depth, number=8, overlap=.1) > xyplot(lat ~ long | Depth, data = quakes, layout=c(2,2))2 pages are drawn but the second page overwrites the first one, does anybody know how to plot the graphs on 2 separate devices? Eric Esposito