Dot graph language - how to make bidirectional edges?

Question

Here is a very simplified example of my point graph:

strict digraph graphName { A->B B->A } 

It creates

Instead, I want one edge to be shown between A and B, but with a double arrow. I know how to get a double arrow as a global option:

 strict digraph graphName { edge [dir="both"] A->B B->A } 

But it looks very ugly, and not all of my edges should be double-headed.

If I do additional processing of the chart and find a double link myself and replace two edges with one edge, everything will be all right. But I would rather not take this extra step

 strict digraph graphName { A->B [dir="both"] } 

Are there any better solutions?

Answer 1

How about concentrate = true?

 strict digraph graphName { concentrate=true A->B B->A } 

From the documentation :

If true, use edge concentrators. This combines several edges into one edge and forces partially parallel edges to divide part of their paths. The latter function is not yet available outside the point.

Answer 2

You should just use:

A → B [dir = "both"]