@rebroad
What more obvious way might there be to reveal the Y axis is toggle-able?
Yes, button, of course! Checkbox, radio, all those are good.
A tooltip on the graph perhaps?
Improves from no tooltip, but no,
that’s not enough improvement.
I am reluctant to add extra buttons given the slider is already providing many values in so little space, so I do prefer the clicking on the graph to change it.
What? No, that’s an huge slider. An unnecessarily large one.
Sliders can be as small as necessary when they are
combined with a text-box presenting the slided value.
There’s a huge empty space below the legend too.
There’s plenty of available space to discard invisible toggles.
It may be that someone finds it by accident, but then this could be a pleasant surprise that - an “easter egg” feature!
No, an easter egg is meant to be fun or charming in
some way. Hiding actual feature in the same way like
one could do with a true easter egg transgredes
the principle of least surprise.
Cheers!