How to set default font, or default style in Graphviz's Dot language

All we need is an easy explanation of the problem, so here it is.

It seems, every tutorial every example scripts explicitly states what font should be used for each node/arrow.

Instead, I’d like to specify default font which all arrows and nodes use only once (may at the beginning of file, or maybe separate style file sheets)

link

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

Put something like this at the top level:

node [fontname="default-node-font"];
edge [fontname="default-edge-font"];

I can’t find this explicitly in the online manual (it’s alluded to under https://www.graphviz.org/doc/info/lang.html#lexical-and-semantic-notes) but it’s clearly documented in the man page.

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

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