A K2 article image (the one that is placed on the image tab) will automatically have a function added so that when you click on it and it will show up full-size in a lightbox. Is there a way to do that to other images that are placed in the text?

Hi. Yes. Just add the modal class to your markup. Example:As you can see you need to have two images, one for using in the modal and one to be used as a thumbnail in the text.

Excellent! Thank you!

You are welcome.

As I am moving forward with the lightboxes I see that they do not work on my entire site. Here is an example:
This page:
joom33.ecaminc.com/index.php/presentationslist/presentations has an article item titled "Tales of an Expert Witness: Death in Discovery (Keynote)" In the category listing the lightbox on the gavel does not work. However, when you look a the complete article the light box works. I have spent a couple hours trying to figure this out and am totally stumped.

I think this must be some category setting. I just cannot figure out which setting. I do not think it is CSS since the same problem exists on multiple templates. (I have tried it on the Beez template and see the same behavior.)

Have you seen this before?

Cheers,
Todd

In some views the modal is not initialised.
You need to add this to your template or in K2's category.php file.
Another option would be to use another lightbox engine like Swipebox which requires a custom setup or looking for an extension (possibly a plugin for your editor) that offers this functionality out of the box.