Hi hush !
you can do it following way below :
– Create new logo file with name is “logo-bellatrix.png” , replace old file in templates/ja_bellatrix/images folder .
– Open index.php file in templates/ja_bellatrix folder , find following code section at about line 383 :
<script type="text/javascript">
od_displayImage('sitelogo', '<?php echo $ja_template_path;?>/images/logo-bellatrix', 223, 50, '', '<?php echo $mosConfig_sitename?>');
</script>
you enter width and height of new logo replace for old size ( red text ) .
