Need LIGHTBOX images to run horizontally down page — not vertically

Hello All —

My site has pictures which are lightboxed on each individual page. I need these images to run HORIZONTALLY across the page instead of vertically down the page.

Click on a link to any guitar on my site and you’ll see what I mean —

https://vintageprsguitars.com/

Is there anyway to get the images running horizontally instead of vertically? Any help would be greatly appreciated!

stampedtandb AT g mail DOT com