How to show more then 3 categories on the front page ?

Hi @severinen

Insert this in your theme functions.php

add_filter('storefront_product_categories_shortcode_args','custom_storefront_category_per_page' );

// Category Products
function custom_storefront_category_per_page( $args ) {
	$args['limit'] = 10;
	return $args;
}

Check out this tutorial for more storefront customization tips.

Thanks