How can i add Font Icons

Hey Ansgar,

Please refer to this post – http://kriesi.at/documentation/enfold/adding-your-own-icon-fonts/.
For FontAwesome icons, please add following code to bottom of Functions.php file in Appearance > Editor

function avia_add_fontawesome(){
?>
<script src="https://use.fontawesome.com/e95b19dda6.js"></script>
<?php
}
add_action('wp_head', 'avia_add_fontawesome');

Best regards,
Jordan Shannon