Oxygen/config.php

<?php
/*******************************************************************/
/* if you want to change the values */
/*******************************************************************/

// Replace the KB logo with your own logo
// Just copy your logo-file in the "Oxygen/Assets/images" directory in the plugin directory
// The file should be to 50 Pixel is a good height
// Uncomment the next line. 

$themeOxygenConfig['logo'] = 'brand-logo.png';