finlabsindia/wp-content/plugins/ninja-forms/includes/Templates/ui-nf-toggle-drawer.html.php

<a class="nf-toggle-drawer">
    <span class="dashicons dashicons-admin-collapse"></span><span class="nf-expand-off"><?php _e( 'Full screen', 'ninja-forms' ); ?></span><span class="nf-expand-on"><?php _e( 'Half screen', 'ninja-forms' ); ?></span>
</a>