Daily Bolt: increase posts per page

functions.php

//* Show 12 posts per page
add_action( 'pre_get_posts', 'nabm_change_posts_per_page' );
function nabm_change_posts_per_page( $query ) {
	if ( ! $query->is_main_query() || is_admin() || is_feed() ) {
		return $query;
	}
	if ( is_front_page() ) {
		$query->set( 'posts_per_page', 12 );
	}
	return $query;
}