CSS or similar to add Captions to POPPED images from lightbox

My question is how to get captions to appear within the popup, NOT the gallery, either static or as rollover in the example shown. Rational: thumbnails just to be scanned and extra detail to be visible on larger image, such as date, medium etc. 

CSS please?!

You mean do this for a regular Image Block? 

Hi, more like a caption on a slide within a lightbox. Am newbie to this but have found various threads on the same issue. Something similar to https://www.clairebaily.com/one would be amazing. I have used CSS from other entries by you successfully to get caption onto images within a lightbox. With the example I cite, the caption rollover expanding to the image width is very appealing, and I see this is somehow using wrapper?

Thanks for your reply!

Ah got it. Can you share link to page where you use image on your site? And do you use Personal or Business or Commerce Plan?

I am using personal right now at a trial level

site is here:https://lute-lychee-5bck.squarespace.com/config/pages

password jdtest1

page to view would be paintings. I have a border around the image and am wondering if it is possible to set the caption within this border, align left on a dark ground, so each caption "box" will size to the image width?

On 10/24/2023 at 1:28 AM, JimOldman said:

I am using personal right now at a trial level

site is here:https://lute-lychee-5bck.squarespace.com/config/pages

password jdtest1

page to view would be paintings. I have a border around the image and am wondering if it is possible to set the caption within this border, align left on a dark ground, so each caption "box" will size to the image width?

/config is url for site owner, if you open page in edit mode >> Look at top right or top left > There is an arrow > Click on it > real url will appear on browser address bar.