Customizing Gallery Captions

[kaguralover]

I want the style of the gallery's captions from another Weebly theme, but only this aspect. Is it possible to edit the CSS to customize it to be the same without changing the theme?

Example of what I want can be found on this site.

Here is a link with an example of what my captions look like.

I am a novice with code lingo and knowledge, so if you could keep potential answers simple, I would appreciate it.

Thank you!

[PaulMathews]

@kaguralover When you click in the image gallery to see the attributes panel, click on "Caption" then change "Thumbnail" to "Lightbox & partial thumbnails," go back to the Caption attributes, and turn off "display on hover."

[kaguralover]

Oh, I apologize, I should have clarified. Both websites are mine and both galleries have the "Lightbox and Partial Thumbnail" gallery option selected. However, due to each website having a different theme, both appear very differently. I want both websites to have the transparent gray background behind the captions. I do not want to change either site's theme, so I am wondering how, if possible, to do so. I imagine I need to edit the CSS somewhere, but do not know how to go about that.

Thank you for your response!