Thanks, Ansley and Billy. | A second issue, turning axes on and off with /axes or /noaxes | qualifiers should not have any effect on an /overlay plot - the axes | are drawn in the initial plot only. I see. I used /noaxes with an /overlay because of my misconception that the former prevented the same axes from being drawn many times. (So, I guess overlay implies noaxes.) Regards, Ryo