I'm a novice with WordPress and pasted this parameter
<?php wp_list_pages('exclude=17,38' ); ?>
into a page I wanted to exclude from the top menu in my theme. It worked but also knocked out two pages off the menu that I wanted there. Now no new pages are added to the menu.
Since then I found the place in my theme settings where I was supposed to exclude pages from the menu with a simple click.
How can we fix the installation so new pages will be listed in the menu again?