WordPress at a glance
filter is not described

manage_pages_columns filter-hook . WP 2.5.0

Filters the columns displayed in the Pages list table.

Usage

add_filter( 'manage_pages_columns', 'filter_function_name_857' );
function filter_function_name_857( $post_columns ){
	// filter...

	return $post_columns;
}
$post_columns(array)
An array of column names.

Where the hook is called

WP_Posts_List_Table::get_columns()
wp-admin/includes/class-wp-posts-list-table.php 585
$posts_columns = apply_filters( 'manage_pages_columns', $posts_columns );

Where the hook is used (in WP core)

Does not used.