Neatline: How do I make expanding lines

Hi,

I'd like to be able to have the lines that point at the object on the map when a user hovers over the text, just like in this exhibit:
http://neatline.dclure.org/neatline/show/gemini-over-baja-california

How is this done?

It's probably a good idea to explicitly note in the titles or bodies of your last several questions that they're about Neatline, so they'll get noticed by the right people.

thanks for pointing that out!

David wrote a little plugin to do this called WordLines (https://github.com/davidmcclure/nl-widget-WordLines). You can read about it at http://scholarslab.org/experimental-humanities/neatline-gettysburg-address/.

How would one use this plugin?