Thanks for the reply! This is a good plan. I was thinking that one answer might be to break up the lines, but I was uncertain how to proceed beyond just splitting the lines up into segments and plotting them adjacent to each other. I took a quick look at the script you referred me to, and it bears similarity to what I am trying to do. I have a database of time-series data from instrumentation, and I am just trying to get the data displayed. Sometimes, these series are quite long and that was where I was getting into trouble. If it is an internal Tk wall, then splitting up the lines is really the only option. Besides, reducing internal overhead would be a very good thing, since my actual script, as it stands, performs kinda slow.