when i Add New Portfolio ltems，how to set [no sidebar] in defult？

Hi ibolee!

Thank you for using Enfold.

Add this in the functions.php file:

add_action( 'after_setup_theme', 'enfold_customization_product_switch' );
function enfold_customization_product_switch(){
	add_filter('avf_builder_elements', 'avf_builder_elements_mod');
}

function avf_builder_elements_mod($elements)
{
    $screen = get_current_screen();
    if( 'portfolio' == $screen->post_type )  {
        $counter = 0;

        foreach($elements as $element)
        {
        	if($element['id'] == 'layout')  {
                $elements[$counter]['std'] = 'fullsize';
            }

            $counter++;
        }
    }

	return $elements;
}

Best regards,
Ismael