See https://www.mediawiki.org/wiki/Extension:Disambiguator for detailed documentation.
The following configuration variables can be set from your LocalSettings.php file.
$wgDisambiguatorIndicateLinks: whether to add a 'mw-disambig' CSS class to links to disambiguation pages$wgDisambiguatorNotifications: whether to show notifications when a user types a link to a disambiguation page.