I would like to set a variable width in Lightbox 2 so that images display at their original size in the modal.

For example for an image of 600px width:
If the width element in the Lightbox settings is left blank, the lightbox overlay fills the entire width of the parent container, while the image displays on the left with a lot of white space on the right.
I want the overlay width to expand or contract according to the image width.

Is there a style that I can change in Lightbox\Styles\default\style.css?

Hello,
Please provide a link to your page, so we can see what is wrong.