I created an options page for admin and displayed it as a top level menu ->
add_menu_page($themename, $themename, 'administrator', basename(__FILE__), 'mytheme_admin');
I want to add a sub menu under the top level menu I created to display exactly the same page (to be displayed as a sub menu but open this page also when user clicks the top level menu).
Also I don't know how to add another theme page I created under this top level menu. I have read the wordpress documentation and couldn't make it, before asking here. Many thanks.