When you customize the waterfall you lose the legend. I have to go back to remember what these 2 lines stand for… The legend should always be there whenever the lines are shown.
Yeah…we should do this. I filed a GH issue since this one seems pretty straightforward. Add Legend to Custom Waterfall Page · Issue #1486 · WPO-Foundation/webpagetest · GitHub
@Josh_Deltener Got that in place now!