Have done it by myself.
Go to - app/code/core/Mage/Adminhtml/Model/System/Config/Source/Catalog/ListMode.php
Add the highlighted code in this function :
class Mage_Adminhtml_Model_System_Config_Source_Catalog_ListMode
{
public function toOptionArray()
{
return array(
//array('value'=>'', 'label'=>''),
array('value'=>'grid', 'label'=>Mage::helper('adminhtml')->__('Grid Only')),
array('value'=>'list', 'label'=>Mage::helper('adminhtml')->__('List Only')),
array('value'=>'listnew', 'label'=>Mage::helper('adminhtml')->__('List New Only')),
array('value'=>'grid-list-listnew', 'label'=>Mage::helper('adminhtml')->__('Grid (default) / List /
List New')),
array('value'=>'list-grid-listnew', 'label'=>Mage::helper('adminhtml')->__('List (default) / Grid /
List New')),
array('value'=>'listnew-list-grid', 'label'=>Mage::helper('adminhtml')->__('List New (default) / Grid / List')),
);
}
}
then go to app/code/core/Mage/Catalog/Block/Product/List/Toolbar.php
Add the highlighted code in this function :
protected function _construct()
{
parent::_construct();
$this->_orderField = Mage::getStoreConfig(
Mage_Catalog_Model_Config::XML_PATH_LIST_DEFAULT_SORT_BY
);
$this->_availableOrder = $this->_getConfig()->getAttributeUsedForSortByArray();
switch (Mage::getStoreConfig('catalog/frontend/list_mode')) {
case 'grid':
$this->_availableMode = array('grid' => $this->__('Grid'));
break;
case 'list':
$this->_availableMode = array('list' => $this->__('List'));
break;
case 'listnew':
$this->_availableMode = array('listnew' => $this->__('List New Only'));
break;
case 'grid-list
-listnew':
$this->_availableMode = array('grid' => $this->__('Grid'), 'list' => $this->__('List')
, 'listnew' => $this->__('List New Only'));
break;
case 'list-grid-
listnew':
$this->_availableMode = array('list' => $this->__('List'), 'grid' => $this->__('Grid')
, 'listnew' => $this->__('List New Only'));
break;
case 'listnew-list-grid':
$this->_availableMode = array('listnew' => $this->__('List New Only'), 'list' => $this->__('List'), 'grid' => $this->__('Grid'));
break;
}
$this->setTemplate('catalog/product/list/toolbar.phtml');
}
Then select the list mode in admin panel
Admin - System - Configuration - Catalog - Frontend
change the list mode there.