adminpagenavigation.php

См. документацию.

<?php
namespace Bitrix\Main\UI;
 
class AdminPageNavigation extends PageNavigation
{
    protected $pageSizes = array(10, 20, 50, 100, 200, 500);
    protected $allowAll = true;

    public function __construct($id)
    {
        parent::__construct($id);
        $this->initFromUri();
    }
}