Vertical centered

I quite like the option of “natural and centered” but I noticed that the centering works only horizontal not vertical. Which means images that are landscape format will be further up than portrait formatted images. It would look nicer if the centering applied also to the vertical. I don’t see an option in the settings for that. Can I change that myself?

https://ww.wp.xz.cn/plugins/slideshow-jquery-image-gallery/