Tips on Customizing WPNewsman Lite

How to Hide G-Lock WPNewsman Lite Admin Menus

function plt_hide_wpnewsman_newsletters_menus() {
	//Hide "WPNewsman Lite".
	remove_menu_page('newsman-mailbox');
	//Hide "WPNewsman Lite → Mailbox".
	remove_submenu_page('newsman-mailbox', 'newsman-mailbox');
	//Hide "WPNewsman Lite → Lists and Forms".
	remove_submenu_page('newsman-mailbox', 'newsman-forms');
	//Hide "WPNewsman Lite → Email Templates".
	remove_submenu_page('newsman-mailbox', 'newsman-templates');
	//Hide "WPNewsman Lite → Action Pages".
	remove_submenu_page('newsman-mailbox', 'edit.php?post_type=newsman_ap');
	//Hide "WPNewsman Lite → Settings".
	remove_submenu_page('newsman-mailbox', 'newsman-settings');
	//Hide "WPNewsman Lite → Upgrade to Pro".
	remove_submenu_page('newsman-mailbox', 'newsman-pro');
}

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

Where do I put this code?

How to Hide G-Lock WPNewsman Lite Meta Boxes

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

	//Hide the "Alternative Plain Text Body" meta box.
	remove_meta_box('newsman-et-meta', $screen->id, 'normal');
	//Hide the "Excerpt for external forms" meta box.
	remove_meta_box('postexcerpt', $screen->id, 'normal');
}

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