How do I scale a graphviz diagram in Sphinx

Question

I have a GraphViz diagram embedded in Sphinx, such as

.. graphviz::
   :caption: My diagram

   digraph {
        a -> b -> c -> d
   }

How do I scale it for display in the HTML generated by Sphinx? It doesn't accept a :scale: directive after the :caption:, so I would need to do something inside the Graphviz. However, Graphviz guides usually leave scaling to command line arguments for "dot".

Answer 1

Never mind I just figured it out. There is a size="x,y" directive where size is in printed inches, so:

.. graphviz::
   :caption: My diagram

   digraph {
        size="4,4";
        a -> b -> c -> d
   }