Customize lightbox size

[TheElectroclassics]

Is there a way to customize the lightbox's size? It defaults to a 16:9 viewport, but I want it to use the whole height of the page and maybe 50~80% of the viewport, so it looks best on mobile and desktop, is there a way to customize it through CSS or is it baked into the JS?

[VTANS]

The same problem here, using the html code described at the Options page:

import Lightbox from 'bs5-lightbox';

const options = {
	keyboard: true,
	size: 'fullscreen'
};

document.querySelectorAll('.my-lightbox-toggle').forEach((el) => el.addEventListener('click', (e) => {
	e.preventDefault();
	const lightbox = new Lightbox(el, options);
	lightbox.show();
}));

changing the values for parameter size like described (sm,lg,xl,fullscreen), but there is no difference.