Tips on Customizing Subscribe Forms – Beautiful Email Forms, Embedded Newsletter Forms & MailChimp Form

How to Hide Subscribe Forms Admin Menus

function plt_hide_wp_subscribe_form_menus() {
	//Hide "Subscribe Forms".
	remove_menu_page('edit.php?post_type=sfba_subscribe_form');
	//Hide "Subscribe Forms → All Subscribe Forms".
	remove_submenu_page('edit.php?post_type=sfba_subscribe_form', 'edit.php?post_type=sfba_subscribe_form');
	//Hide "Subscribe Forms → Add New Subscribe Form".
	remove_submenu_page('edit.php?post_type=sfba_subscribe_form', 'post-new.php?post_type=sfba_subscribe_form');
	//Hide "Subscribe Forms → Integrations".
	remove_submenu_page('edit.php?post_type=sfba_subscribe_form', 'sfba_subscription_settings');
	//Hide "Subscribe Forms → Subscribers List".
	remove_submenu_page('edit.php?post_type=sfba_subscribe_form', 'sfba_subscribers_list');
	//Hide "Subscribe Forms → Recommended Plugins".
	remove_submenu_page('edit.php?post_type=sfba_subscribe_form', 'sfba-recommended-plugins');
	//Hide "Subscribe Forms → Upgrade to Pro".
	remove_submenu_page('edit.php?post_type=sfba_subscribe_form', 'upgrade_to_pro');
}

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

Where do I put this code?

How to Hide Subscribe Forms Meta Boxes

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

	//Hide the "Shortcode" meta box.
	remove_meta_box('sfba_shortcode_meta_box', $screen->id, 'side');
	//Hide the "Step 1: Select Subscribe Form Template" meta box.
	remove_meta_box('sfba_form_showcase_meta_box', $screen->id, 'advanced');
	//Hide the "Customization & Subscription Settings" meta box.
	remove_meta_box('sfba_form_load_form', $screen->id, 'advanced');
}

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