Add reference line to Y-group axis
Hello, I am using graph builder (JMP 17) and have almost what I need. But I need to add a reference line. This first image ('example') is what I currently have (I need all 3 viruses in 1 graph with lines and dots for the rates for both years). BUT, I need to add a reference line for each virus so that it looks like 'example with ref line' (below). I don't know if it is possible. But essentially, ...