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Dear collegue, I have some questions about lattice graphs: 1. How can I introduce different lines in different graphs, from the same page? For example, in the upper row of graphs, I would like to have a line at 0.5, in the middle one at 0.3, and in the lower at 0.1. I am using panel.abline, but I can only make it appear in all the graphs, not in some of tham only... 2. Is it possible that the