Snippet: Add Custom Gap Options

function myprefix_wpex_column_gaps( $gaps ) {
	$gaps['3'] = '3px';
	return $gaps;
}
add_filter( 'wpex_column_gaps', 'myprefix_wpex_column_gaps' );

All PHP snippets should be added via child theme's functions.php file or via a plugin (we recommend WPCode)