Hello There,
Thanks for updating in! The social icons were pre defined. You can only add twitch icon or a custom link by modifying the social icons function. Because what you are trying to accomplish requires a template customization, we would highly to suggest that you use a child theme. This allows you to make code changes that won’t be overwritten when an X update is released. After your child theme is setup, please review how we recommend making template changes in Customization Best Practices.
After the child theme is set up, please add the following code in your child theme’s functions.php file
// Custom Social Output
// =============================================================================
if ( ! function_exists( 'x_social_global' ) ) :
function x_social_global() {
$facebook = x_get_option( 'x_social_facebook' );
$twitter = x_get_option( 'x_social_twitter' );
$google_plus = x_get_option( 'x_social_googleplus' );
$linkedin = x_get_option( 'x_social_linkedin' );
$xing = x_get_option( 'x_social_xing' );
$foursquare = x_get_option( 'x_social_foursquare' );
$youtube = x_get_option( 'x_social_youtube' );
$vimeo = x_get_option( 'x_social_vimeo' );
$instagram = x_get_option( 'x_social_instagram' );
$pinterest = x_get_option( 'x_social_pinterest' );
$dribbble = x_get_option( 'x_social_dribbble' );
$flickr = x_get_option( 'x_social_flickr' );
$github = x_get_option( 'x_social_github' );
$behance = x_get_option( 'x_social_behance' );
$tumblr = x_get_option( 'x_social_tumblr' );
$whatsapp = x_get_option( 'x_social_whatsapp' );
$soundcloud = x_get_option( 'x_social_soundcloud' );
$rss = x_get_option( 'x_social_rss' );
$output = '<div class="x-social-global">';
if ( $facebook ) : $output .= '<a href="' . $facebook . '" class="facebook" title="Facebook" target="_blank"><i class="x-icon-facebook-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $twitter ) : $output .= '<a href="' . $twitter . '" class="twitter" title="Twitter" target="_blank"><i class="x-icon-twitter-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $google_plus ) : $output .= '<a href="' . $google_plus . '" class="google-plus" title="Google+" target="_blank"><i class="x-icon-google-plus-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $linkedin ) : $output .= '<a href="' . $linkedin . '" class="linkedin" title="LinkedIn" target="_blank"><i class="x-icon-linkedin-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $xing ) : $output .= '<a href="' . $xing . '" class="xing" title="XING" target="_blank"><i class="x-icon-xing-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $foursquare ) : $output .= '<a href="' . $foursquare . '" class="foursquare" title="Foursquare" target="_blank"><i class="x-icon-foursquare" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $youtube ) : $output .= '<a href="' . $youtube . '" class="youtube" title="YouTube" target="_blank"><i class="x-icon-youtube-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $vimeo ) : $output .= '<a href="' . $vimeo . '" class="vimeo" title="Vimeo" target="_blank"><i class="x-icon-vimeo-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $instagram ) : $output .= '<a href="' . $instagram . '" class="instagram" title="Instagram" target="_blank"><i class="x-icon-instagram" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $pinterest ) : $output .= '<a href="' . $pinterest . '" class="pinterest" title="Pinterest" target="_blank"><i class="x-icon-pinterest-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $dribbble ) : $output .= '<a href="' . $dribbble . '" class="dribbble" title="Dribbble" target="_blank"><i class="x-icon-dribbble" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $flickr ) : $output .= '<a href="' . $flickr . '" class="flickr" title="Flickr" target="_blank"><i class="x-icon-flickr" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $github ) : $output .= '<a href="' . $github . '" class="github" title="GitHub" target="_blank"><i class="x-icon-github-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $behance ) : $output .= '<a href="' . $behance . '" class="behance" title="Behance" target="_blank"><i class="x-icon-behance-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $tumblr ) : $output .= '<a href="' . $tumblr . '" class="tumblr" title="Tumblr" target="_blank"><i class="x-icon-tumblr-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $whatsapp ) : $output .= '<a href="' . $whatsapp . '" class="whatsapp" title="Whatsapp" target="_blank"><i class="x-icon-whatsapp" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $soundcloud ) : $output .= '<a href="' . $soundcloud . '" class="soundcloud" title="SoundCloud" target="_blank"><i class="x-icon-soundcloud" data-x-icon="" aria-hidden="true"></i></a>'; endif;
if ( $rss ) : $output .= '<a href="' . $rss . '" class="rss" title="RSS" target="_blank"><i class="x-icon-rss-square" data-x-icon="" aria-hidden="true"></i></a>'; endif;
// add your custom icon here
$output .= '<a href="#insert-twitch-url-here" class="twitch" title="Twitch" target="_blank"><i class="x-icon-twitch" data-x-icon="]" aria-hidden="true"></i></a>';
$output .= '</div>';
echo $output;
}
endif;
// =============================================================================
Hope this helps. Please let us know how it goes.