increase default limit of sales_order pagination

Question

How can I achieve in the sales_order adminhtml to display the pagination additionally below the grid?

Also, I would like to have a default limit of 50 rows instead of 20 (in the sales_order pagination). Is that also possible?

EDIT: Since it was a bad idea to combine two questions, I opened a new one for the unsolved question: https://magento.stackexchange.com/questions/96158/add-another-pagination-below-sales-order-grid

Answer 1

Yes possiable,You can do this by changing the value of a variable.

Magento is set the default pagination value at 20 by using variable $_defaultLimit .

As per as you requirement ,you need change this variable value at 50.So you should rewrite class Mage_Adminhtml_Block_Sales_Order_Grid and st this variable value at 50.

rewrite xml code:

<blocks>
   <adminhtml>
     <rewrite>
      <sales_order_grid>Amit_CustomSales_Block_Adminhtml_Order_Grid</sales_order_grid>
     </rewrite>
   </adminhtml>
</blocks>

Rewrite class :

<?php
class Amit_CustomSales_Block_Adminhtml_Order_Grid extends Mage_Adminhtml_Block_Sales_Order_Grid{
    protected $_defaultLimit    = 50;
}