How to change font style?

[CoinCoderBuffalo]

I'm using this in an expo web project. How can I modify the font style?

const GalleryCard = props => {

	const { Layout, theme } = useThemeContext();
	const styles = useStyles();

	const settings = {
	  width: '600px',
	  height: ['250px', '170px'],
	  layout: props.images.length == 1 ? [1] : [1,2],
	  photos: props.images,
	  showNumOfRemainingPhotos: true
	}

	return <ReactPhotoCollage {...settings} />
}