Plot a point on the line path (in node-red-contrib-web-worldmap)

Here below is how my map looks.

And this is the code for this.

Now I would want a big size highlighted point on the line(path) there, maybe like *,X . And also if possible I want a message to popup with big size. Can you help.Thanks in advance

can't you just plot them as "normal" points - choose from any of the fa-icons etc ?
Or maybe draw an area or circle or... - maybe check the README for many options

I edited the title to make it clear that you are talking about basemap rather than a graph.