Tips on Customizing WP Composer – The Easiest Page Builder

How to Hide WP Composer (Lite) Admin Menus

function plt_hide_page_builder_wp_menus() {
	//Hide the "WP Composer" menu.
	remove_menu_page('wpc-welcome');
	//Hide the "WP Composer → About1" menu.
	remove_submenu_page('wpc-welcome', 'wpc-welcome');
	//Hide the "WP Composer → General Settings" menu.
	remove_submenu_page('wpc-welcome', 'wpc-global-settings');
}

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

Where do I put this code?

How to Hide the "Post Attributes" Meta Box

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

	//Hide the "Post Attributes" meta box.
	remove_meta_box('pageparentdiv', $screen->id, 'side');
}

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