Zoom image in lightbox?

I would like to be able to zoom in on images on my website when they are open in the lightbox...I'd like to be able to zoom in either by scrolling or by clicking + /- buttons and then be able to pan around. I do not want a magnifier though. And I don't want to lose the ability of clicking the arrows on the sides to go to the next image. Is there a code I can add to make zooming in on an images in the lightbox possible? My website isn't published yet, so I can't provide a link...

I don't understand coding at all, so I don't know how much information is needed, but my images are in a Summary block that displays a separate Gallery page (because that's the only way I could get everything to display the way I wanted). The page that the Summary block is on has slug /ryugu-jo and the Gallery page that the images are actually on has slug /ryugu-jogallery. But I open the images in the lightbox from the Summary block on the ryugu-jo page and that's where I want to zoom in on them...Hope that makes sense...

Following this thread, I am in the same situation 🙂