In order to enable additional initialization-time options to the Google Analytics script, please follow the instructions below:
Disable the current option in Vamtam/General and get a child theme from http://vamtam.com/child-themes/. Once you've done that, put the following in the child's functions.php file:
function child_ga_script() {
?>
<script>
window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
ga('create', 'UA-XXXXX-Y', 'auto');
ga('require', 'displayfeatures');
ga('send', 'pageview');
</script>
<script async src='https://www.google-analytics.com/analytics.js'></script>
<?php
}
add_action('wp_head', 'child_ga_script', 10000);
Change the bold part to you analytics id.