How to Customize the Admin Area in EDD Dashboard

add_action( 'edd_dashboard_register_new_fields', 'my_custom_edd_dashboard_field' );
 
/**
 * Add a custom menu to the EDD Dashboard.
 *
 * @param string $prefix EDD Dashboard prefix.
 */
function my_custom_edd_dashboard_field( $prefix ) {
	CSF::createSection(
		$prefix,
		array(
			'title'  => __( 'My Menu', 'edd-dashboard' ),
			'fields' => array(
				array(
					'type'    => 'subheading',
					'content' => __( 'My Heading', 'edd-dashboard' ),
					'class'   => 'primary',
				),
				array(
					'id'      => 'opt-text',
					'type'    => 'text',
					'title'   => 'Text',
					'default' => 'Hello world.',
				),
				array(
					'id'      => 'opt-textarea',
					'type'    => 'textarea',
					'title'   => 'Textarea',
					'default' => 'Lorem ipsum dolor.',
				),
			),
		)
	);
}

// Get the value from the 'opt-text' option
$get_text = edd__utils( 'main', 'get_option', 'opt-text' );
 
// Get the value from the 'opt-textarea' option
$get_textarea = edd__utils( 'main', 'get_option', 'opt-textarea' );