Tips on Customizing Emails & Newsletters with Jackmail

How to Hide Emails & Newsletters with Jackmail Admin Menus

function plt_hide_jackmail_newsletters_menus() {
	//Hide "Jackmail".
	remove_menu_page('jackmail_campaigns');
	//Hide "Jackmail → Campaigns".
	remove_submenu_page('jackmail_campaigns', 'jackmail_campaigns');
	//Hide "Jackmail → Create a campaign".
	remove_submenu_page('jackmail_campaigns', 'jackmail_campaign');
	//Hide "Jackmail → Workflow".
	remove_submenu_page('jackmail_campaigns', 'jackmail_scenario_choice');
	//Hide "Jackmail → Workflow".
	remove_submenu_page('jackmail_campaigns', 'jackmail_scenario');
	//Hide "Jackmail → Workflow".
	remove_submenu_page('jackmail_campaigns', 'jackmail_scenario_woocommerce_email_notification_choice');
	//Hide "Jackmail → Workflow".
	remove_submenu_page('jackmail_campaigns', 'jackmail_scenario_woocommerce_email_notification');
	//Hide "Jackmail → Lists".
	remove_submenu_page('jackmail_campaigns', 'jackmail_lists');
	//Hide "Jackmail → Create a list".
	remove_submenu_page('jackmail_campaigns', 'jackmail_list');
	//Hide "Jackmail → List detail".
	remove_submenu_page('jackmail_campaigns', 'jackmail_list_detail');
	//Hide "Jackmail → Templates".
	remove_submenu_page('jackmail_campaigns', 'jackmail_templates');
	//Hide "Jackmail → Template".
	remove_submenu_page('jackmail_campaigns', 'jackmail_template');
	//Hide "Jackmail → Statistics".
	remove_submenu_page('jackmail_campaigns', 'jackmail_statistics');
	//Hide "Jackmail → Settings".
	remove_submenu_page('jackmail_campaigns', 'jackmail_settings');
	//Hide "Jackmail → Account".
	remove_submenu_page('jackmail_campaigns', 'https://my.jackmail.com');
	//Hide "Jackmail → Break the limit".
	remove_submenu_page('jackmail_campaigns', 'https://www.jackmail.com/pricing');
	//Hide "Jackmail → Support".
	remove_submenu_page('jackmail_campaigns', 'https://www.jackmail.com/docs');
}

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

Where do I put this code?

How to Hide the "Jackmail" Meta Box

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

	//Hide the "Jackmail" meta box.
	remove_meta_box('meta-box-id', $screen->id, 'advanced');
}

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