Couldn't format symbol shape in Color Map.

Hi , 

In ArcGIS Map function in Power BI, I am trying to plot a route heat map, where each lat, long value pairs are associated with a score and I`m trying to color the route based on the score.(I tried heatmap in Map theme that didn't work well in classifying the route). When I try to format symbol shape using the Symbol Style tab in ArcGis Map. I can only see function to change transparency and layer color scheme like to High to low etc. But I dont see any option like symbol style option like border, High Color or Low Color, symbol shape etc., 

So somebody please let me know does Power BI has those option or not. 

thanks 

Ashik