Tips on Customizing Nonaki – Drag and Drop Email Template builder and Newsletter plugin for WordPress

How to Hide Nonaki Email Template Builder Admin Menus

function plt_hide_nonaki_email_template_customizer_menus() {
	//Hide "Nonaki".
	remove_menu_page('wpnonaki');
	//Hide "Nonaki → Dashboard".
	remove_submenu_page('wpnonaki', 'wpnonaki');
	//Hide "Nonaki → New Template".
	remove_submenu_page('wpnonaki', 'nonaki-choice-type');
	//Hide "Nonaki → Templates".
	remove_submenu_page('wpnonaki', 'edit.php?post_type=nonaki');
	//Hide "Nonaki → Contacts".
	remove_submenu_page('wpnonaki', 'edit.php?post_type=nonaki_contact');
	//Hide "Nonaki → List".
	remove_submenu_page('wpnonaki', 'edit-tags.php?taxonomy=list&post_type=nonaki_contact');
	//Hide "Nonaki → Add-ons".
	remove_submenu_page('wpnonaki', 'nonaki-addons');
	//Hide "Nonaki → Settings".
	remove_submenu_page('wpnonaki', 'nonaki-settings');
}

add_action('admin_menu', 'plt_hide_nonaki_email_template_customizer_menus', 11);

Where do I put this code?

How to Hide the "Contact Information" Meta Box

function plt_hide_nonaki_email_template_customizer_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Contact Information" meta box.
	remove_meta_box('custom_contact_meta_box', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_nonaki_email_template_customizer_metaboxes', 20);