Markup Mode

[rashley-iqt]

Describe the feature you are requesting

Allow users to add a layer of markup on top of the displayed visualization.

Describe your use case

When presenting data visualized by CRviz to other audiences it would be exceptionally useful to have some ability to highlight or otherwise direct attention to some particular item or group of nodes.

Explain how this feature supports your use case? Other use cases?

Additionally this feature could allow users to display supplemental or contextual information. Ideally there should be a mechanism to export the markup as an image, possibly without displaying the controls.