WordPress at a glance
action is not described

edit_page_form action-hook . WP 1.5.0

Fires after 'normal' context meta boxes have been output for the 'page' post type.

Usage

add_action( 'edit_page_form', 'action_function_name_5550' );
function action_function_name_5550( $post ){
	// action...
}
$post(WP_Post)
Post object.

Where the hook is called

In file: /wp-admin/edit-form-advanced.php
edit_page_form
wp-admin/edit-form-advanced.php 590
do_action( 'edit_page_form', $post );

Where the hook is used (in WP core)

wp-includes/class-wp-embed.php 44
add_action( 'edit_page_form', array( $this, 'maybe_run_ajax_cache' ) );