I have a multiplot (subplots) plot, with one or more scatter plots on each subplot axis.
Is there a way to group these scatters into a single entry in the global legend?
Using a scattergroup doesn’t work, they’re toggled together but I need one one entry per group.
My temporary workaround is to keep a global state and set the
showlegend: true only to the first trace (of the same
legendgroup) and to false` for traces afterwards.
Also, is there a way to style the legendgroups so they look like regular legend entries? It is… without additional margin between each legend group.