Usage tips

Local vs 'online' rendering

(See footnote^[1] for why 'online' is in scare-quotes).

The advantage of the web-apps over local rendering is that they provide a nice interactive editor, for if you want to tweak your output.

Magnus Jacobsson's Graphviz Visual Editor is especially good for this, as it provides a GUI interface for adding new nodes and changing styles. (It is also the renderer linked from the official graphviz.org website, and its repository is receiving active updates at the time of writing).

You can use Magnus's app by providing the following as keyword argument to depgraph_web:

julia> base_url = PkgGraph.webapps[2]
"http://magjac.com/graphviz-visual-editor/?dot="

julia> # And then:
       # depgraph_web(:MyPackage; base_url)

Styling Graphviz output

The fastest way to find how to do something with the Graphviz DOT language, is probably to look at graphviz.org/gallery, and find an example that does something similar to what you are looking for. Every example comes with the DOT source that produced it.

You could also take a look at the Attributes documentation.

Note that it is often hard or not feasible to achieve a particular graphic effect with Graphviz. (See the quote by one of Graphviz's authors in Graphviz today). The better option, if you want a particular style, is probably to import the generated SVG image into a design program, and then edit that manually; or even to copy and re-create the graph from scratch.