history plot strange stuff when selecting one graph

I have a busy history plot. I want to look at one graph closely (“skew_sec”), I click on the word “skew_sec” in the legend (this works), zoom in vertically to see the graph (the rescaling is already fixed somewhere, good), and notice that when I move the mouse around the plot, it responds as if all the other graphs were plotted, too, it shows the round pointer with graph names and values, i.e. for the “fifo used” graph. these graphs themselves of course are not plotted, I only see the “skew_sec” graph (correct). but the mouse pointer thinks they are there.

As a secondary problem, in this mode, there is no indication which graph I am looking at (except for the colour, but on a busy plot there is too many colours that look the same). In the old history plots, the name of the selected graph was shown somewhere at the top of the plot or in the legend, etc.

https://daq16.triumf.ca/?cmd=History&group=EVB&panel=Statistics&A=1599836604&B=1599840204

K.O.

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