[stephen]

Hi,

Please follow step by steps:
– Go to Admin >> Configuration >> General >> Design >> Header >> Small Logo Image Src and select your logo
– Go to file: app/design/frontend/default/sns_ostore/template/page/html/header.phtml find and replace code:

<?php
if(Mage::getStoreConfig('design/header/logo_src')!=''){ ?>
	<img src="<?php echo $this->getLogoSrc(); ?>" alt="<?php echo $this->getLogoAlt() ?>" />
<?php
} ?>

by:

<?php
if(Mage::getStoreConfig('design/header/logo_src')!=''){ ?>
	<img class="logo-large" src="<?php echo $this->getLogoSrc(); ?>" alt="<?php echo $this->getLogoAlt() ?>" />
<?php
if(Mage::getStoreConfig('design/header/logo_src_small')!=''){ ?>
	<img class="logo-small" src="<?php echo $this->getLogoSrcSmall(); ?>" alt="<?php echo $this->getLogoAlt() ?>" />
<?php
} ?>

– Now you can use css to display it on your devices