Tips on Customizing PDF Poster – PDF Embedder Plugin

How to Hide PDF Poster Admin Menus

function plt_hide_pdf_poster_menus() {
	//Hide "PDF Poster".
	remove_menu_page('edit.php?post_type=pdfposter');
	//Hide "PDF Poster → PDF Poster".
	remove_submenu_page('edit.php?post_type=pdfposter', 'edit.php?post_type=pdfposter');
	//Hide "PDF Poster → Add New Pdf".
	remove_submenu_page('edit.php?post_type=pdfposter', 'post-new.php?post_type=pdfposter');
	//Hide "PDF Poster → Help".
	remove_submenu_page('edit.php?post_type=pdfposter', 'fpdf-support');
	//Hide "PDF Poster → Settings".
	remove_submenu_page('edit.php?post_type=pdfposter', 'fpdf-settings');
	//Hide "PDF Poster → Affiliation".
	remove_submenu_page('edit.php?post_type=pdfposter', 'pdf-poster-affiliation');
	//Hide "PDF Poster → Contact Us".
	remove_submenu_page('edit.php?post_type=pdfposter', 'pdf-poster-contact');
	//Hide "PDF Poster → Upgrade".
	remove_submenu_page('edit.php?post_type=pdfposter', 'pdf-poster-pricing');
}

add_action('admin_menu', 'plt_hide_pdf_poster_menus', 1000000000);

Where do I put this code?

How to Hide PDF Poster Meta Boxes

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

	//Hide the "New Feature ! Quick Embed" meta box.
	remove_meta_box('Shortcode', $screen->id, 'side');
	//Hide the "PDF Poster Configuration" meta box.
	remove_meta_box('_fpdf', $screen->id, 'advanced');
}

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