Request for legend customization

[XYE-exeter]

Great function. This is not an issue per se, it is just a feature I thought could make the graph more customizable. I hope we can adjust the legends. For example, when raw data are not visible, the raw data legend is not shown in the legend box. Also, it would be great if we could set the legend box to be on and off and specify the location of the legends.

Thanks for your consideration. Great job!