As the masking requirements for public schools changed so does my map. This time I figured out how to link sources in the tooltips. Tooltips are apparently what you call the hover-over information. I like having clear sources for my visualizations it is important that I can retrace my steps and I would like others to be able to retrace my steps. This is especially important because I work with so many sources of data and my products often have a quick turnaround time.