render_graph layout

[Benj19882023]

Hi,

I just started using DiagrammeR and it is great.

My problem is that I cannot select the layout when using export_graph instead of render_graph.
My graph looks perfect using render_graph(graph, layout = "tree") but I could not figure out how to select the same layout when exporting.

Any hints for that? Or any interest in adding this feature?

Thank you