Number of items that are shown simultaneously

Hello there, did you check the settings page?

Ahh I just saw on that link that you use the slider so I guess you need to increase the slider’s columns.

You can use that function to adjust the slider. Paste that into your child theme’s functions.php file ( always backup first if you are not familiar with code edits )

If you read the JS on that PHP function you ll find out what to adjust to increase/decrease the columns. It will display 6 items if you paste it as it is.

function v_woo_related_slider() { 
  if (is_product()) {?>
	<script>
	jQuery(document).ready(function($) {
	$("#woorelatedproducts").data('owlCarousel').destroy();
  	var owl = $("#woorelatedproducts");
	  owl.owlCarousel({
	      items : 6,
	      itemsDesktop : [1000,3],
	      itemsDesktopSmall : [900,3],
	      itemsTablet: [600,2],
	      autoPlay: 3500,
	      itemsMobile : false,
	  });
	  });
	</script> <?php 
	}
}
add_action( 'wp_footer', 'v_woo_related_slider' );

I hope that helps, feel free to reopen this if you need more help.
Thanks.