How do we modify the line the dots are placed around? I thought it was tied to the height of the chart, but that doesn't change anything. I've been tinkering around, but I haven't found anything that helps to shift it downwards (I have a lot of intersecting points that create bands of dots that extend above the viewable area of the chart)

I think your issue is with the dodge function (https://observablehq.com/@observablehq/plot-dodge for more details). I used it in the first place to avoid occlusion problems, with items on top of each other. I'm working on a solution with clustering of items to avoid the overflows. I'll let you know when it's ready.

Thanks! No rush. My notebook now directly imports from this notebook