This tutorial shows how to change your ZenCart store logo.
Logo is created using the GIF image. logo.gif file is located in the includes\templates\theme###\images directory.
To replace the logo create your logo.gif file and upload it to the includes\templates\theme###\images directory replacing the existing one.
In case you want to change logo filename or extension please open \includes\templates\theme###\common\tpl_header.php file and using the search tool (CTRL+F) search for the following code:
<?php echo zen_image(DIR_WS_TEMPLATE.'images/logo.gif'); ?>
You can also search using ‘logo’ keyword. In the above line replace logo.gif with your filename.
For more details please check the video tutorial below:How to change logo and slogan in ZenCart,