A little off-topic, but wondering if someone can shed some light on the CategorySources plugin.
A client site has hundreds of articles (in an 'articles' structure) that are currently assigned to categories via a categories field. It would be great if they could view the articles by category (which I assume is what the plugin is for?). I installed, activated, and selected the category groups in the plugin settings, but I'm not seeing any obvious changes to the CP. Where are these mysterious category sources? Or am I missing the point? The plugin docs are a bit light on specifics.