I'm not quite sure how the size of the window relates to the graph.
The width of the blocks are always the same. When you resize the graph, it refigures how many blocks fit on a line, and therefore how to space the lines. So more tracks = more lines = less space between lines. Bigger window = more tracks per line = less lines = more space between lines. Does that help?
_________________________
-Jeff
Rome did not create a great empire by having meetings; they did it by killing all those who opposed them.