Solved!
in my functions.php
function projects_customize_register( $wp_customize ) {
$wp_customize->add_setting(
'blog_layout_view', array(
'default' => 'grid',
'sanitize_callback' => 'wp_kses_stripslashes',
)
);
$wp_customize->add_control(
'blog_layout_view', array(
'label' => esc_html__( 'Blog Layout', 'shapely' ),
'description' => esc_html__( 'Choose how you want to display posts in grid', 'shapely' ),
'section' => 'shapely_blog_section',
'type' => 'select',
'choices' => array(
'grid' => esc_html__( 'Grid only', 'shapely' ),
'large_image_grid' => esc_html__( 'Large Image and Grid', 'shapely' ),
'large_image' => esc_html__( 'Large Images', 'shapely' ),
'new_option' => esc_html__( 'New Option', 'shapely' ), // Aggiungi la nuova opzione qui
),
)
);
}
add_action( 'customize_register', 'projects_customize_register', 11 );