how to Assign a width to the popup body

oops

sorry I meant to create a new issue but instead replied to this one. I then created the issue regarding an image with popups.

There are two ways to do this:

1) Apply to one specific popup:
[popup id="my-id" ...]
In the theme CSS:
#my-id a.popup-title{ width: 100px}

2) Apply to a group of popups:
[popup class="my-class" ...][popup class="my-class" ...][popup class="my-class" ...]
In the theme CSS:
div.my-class a.popup-title{ width: 100px}

My pleasure