Is it possible to make an arrow in feature viewer?

[Choalter]

Hi there.
I am developing web pages using this feature viewer and have a question to help users understand.
When I am trying to create a path-type feature in this viewer, I think it would be nice to be able to show the direction of the arrow.
So, I've tried several ways to display the arrows but couldn't find a way.
If there is any way to show arrows in this feature viewer, I would be grateful if you could let me know.

Thanks :)