I have a figure with multiple legends and I would like to be able to label them.
I would like to put a title/label Some label
on the legend, as shown below. This is not a duplicate of this answer which only states how to place a legend on the figure.
I have checked the legend guide but can't find any info on how to do this.
Again, please don't close this question (as was this one) it's not a duplicate of the answer linked above. That answer does not give any information on adding a label/title to a legend.